Ever since humans developed spoken language, we've all been complaining about that guy. He (or she) is a psychological construct that represents all that is wrong with any given situation. Here's who that guy might be in the workplace. Hint: you don't want to be that guy.

The Jerk. Whether it's a boss who breathes fire or the person who seems to be a limitless fountain of nasty remarks, nothing is more toxic to a working environment than somebody who's excessively mean. Sure, you might argue that Steve Jobs didn't pull any punches when he had a bone to pick with his team. But Steve Jobs invented the iPhone. What has Bob from Accounting done lately? Don't be a jerk unless you are also somehow able to win people over because everything you stand for is exactly that amazing. Actually, even then, don't be a jerk.

The Negative One. Like Sadness from Pixar's Inside Out, the Negative One always predicts the worst possible outcome in any given situation. S/he assumes that other people are fundamentally bad and untrustworthy, and that the company is probably going under soon anyway so why even bother with any of it? The negative one drags the team down. Be positive. It's the best thing you can do for your career.

The Martyr. "Oooookay, I guess I can squeeze that task in, even though my schedule is soooo tight as it is. I'll probably have to stay late. Again. But no, it's fine, really. No problem at all." Please just say no. You're not winning any points and you're definitely not winning any respect.

The Jealous One. "How come Bob always gets the best projects? I never get anything interesting to do. Bob isn't even the best person for the job," says the Jealous One, unaware that her unpleasant pettiness is probably part of the reason why she's not being given more responsibility. Be proactive in stepping up to do more instead of waiting for opportunities to fall into your lap.

The Slob. Okay, I'm the slob. I haven't seen the surface of my desk in a really long time. There's an upside and a downside to being the slob on the job; science says that messiness does have its creative advantages. But be warned: people with messy workspaces are also less likely to finish what they start.

The Lazy One. Some people are just allergic to work and will do whatever they can to avoid doing it. Some of them even get away with it, skating by with middling performance reviews or otherwise flying under the radar. You might think you're getting away it, but the only person you're hurting is yourself.

The Smelly One. If you don't know who the smelly one is at your job, it might be you. Rethink the perfume or cologne.

The Incompetent One. You can't believe it. Bob screwed up again. Un. Believable. Whether they're his fault or not, his mistakes are becoming costly for the team. Maybe he's just not suited to this work, or maybe his objectives weren't clear from the start. It usually isn't a surprise to anyone when the underperforming members of a team are weeded out. If you feel yourself slipping, try to course correct before things get dire by getting the training or clarification you need.

The Loner. Now, don't confuse "loner" with "introvert." Many of the most successful people are introverts. There is a difference, however, between being introverted and not talking to anyone, ever. Even if you're the most shy person on the planet, your goal should be to interact with everyone on your team in a friendly and collaborative enough way so that when someone asks them, "Hey, you know Bob?" their response will be, "Yeah, he's a really nice guy, great to have on the team!"

The Scapegoat. Whenever things really start breaking, it's human nature to play the blame game. This is totally Bob's fault. Blame will pingpong all over the place, and often it will coalesce around one person. That's your scapegoat. Do whatever you can to avoid being this person. Illustrate your efforts with data as needed. The scapegoat is usually the person who is least prepared to handle scrutiny. Hope for the best, but cover your ass like winter is coming.

The Emotional Trainwreck. There's always that person who can't get their act together to the extent that it starts to affect work. They show up late. Maybe they had a bad breakup, or some other personal problem, or ... fill in the blank. As a mental health professional (jokes aside, I actually am one), I encourage you to seek help for any emotional problems you may be having, preferably before they begin to affect your professional life.

The One Who Stops Showing Up. Usually the late-stage Emotional Trainwreck. They just stop coming to work one day. Where's Bob? Uhhh, no idea. For whatever reason, giving notice was not on his agenda. As gratifying as that fantasy may be when you've really had enough, it's wise not to burn your professional bridges in the event that you need a recommendation or if you'd like to work in that field again. It's an uncomfortably small world.

The One Who Takes All the Credit. There's no "i" in team. But there is one in "thief," which is what this person (usually a manager) is when they try to absorb all the glory for achievements that they had a very minimal hand in. Don't be that guy.

The One Who Never Follows Through. "I'll have this done by the end of the week, and then next week I'll be focusing on <blahblah>." It's a great plan, but don't get too attached, because this person never follows through. Don't be that person. You'll build a personal brand that's all talk and no results.

The One Who Seriously Doesn't Even Care Anymore. Have you ever been next-level jaded at a job to the point where you're not even slightly invested in your responsibilities? Time to move on.

The Fish Microwaver. I'm mad at you, fish microwaver. I appreciate a nice, hot slab of fish as much as the next person. But not here. Not like this.

The Gossip. It is only a matter of time before you accidentally CC the wrong person on a ruinous email. You laugh, but this actually happens. And you really, really don't want to be that guy.