Looks more like the cast of Real World than a group of college kids.
"S-so, should we write on him, or..."
The Guy No One Likes
He probably looks something like this guy.
He commits party fouls without shame, like breaking the table or spilling beer on the rug. He has an asinine sense of humor, and always manages to offend someone with his off-color humor. He uses slang way too much and probably has barbwire tattoos. He is also frequently seen urinating in the bushes. Everything about his personality is repulsive. He brags about things that he may or may not have done in high school - hard to believe you were a quarterback legend if your arms have the consistency of tube socks filled with Jell-O pudding.
"Yeah, just let myself go a little. You know how it is, bro."
The Old Guy
"I started school late...YAKNOWHADDAMEAN?!?"
He definitely has a BEARD. Maybe KIDS. Possibly a MORTGAGE. Not to be confused with continuing education students, those who were in the military before college, etc. - this guy went straight to college right after he graduated high school.
"Beverly Anne took that Colored boy Earl to the prom that year."
"Born in 93... how old is that? Old enough."

ALWAYS a woman. She graduated from Albert Einstein's Consortium for Space Technology, Alchemy and Logarithms with a 6.7 GPA, which doesn't even make sense to you because the highest you could possibly attain at YOUR slovenly public school was a 4.0. Pfft, dumbass.
She knows EVERYTHING.
"What? MEROZOITES reside in the liver, TROPHOZOITES reside in red blood cells. Moron."
She makes this clear because she's in all of your hard classes. She talks to the professor WAY too much during these classes. What makes her most annoying though, is that without fail, after every exam she asks to compare answers with you. EVERY TIME. The session usually goes something like this -
Girl: That test was CRAZY, wasn't it?
You: Yeah, seriously.
Girl: I wasn't sure of a lot of the answers - what did you get for 3?
You: Uh, I wasn't sure, but I marked D.
Girl: D? No, that's definitely not it. The answer was C.
You: Oh.
Girl: Yeah, the factorial of the vermiform appendix causes an inflation cardioid parabola, not biochemical metabolysis - you don't remember from class?
You: Uh...what?
She then proceeds to rip any answer you have, making you wonder why she would bother asking YOU of all people to compare answers in the first place. This was only done to boost her self-esteem, so she could go into the weekend feeling great and you go into the weekend feeling like it's time to switch majors.
I know I'm missing a few - who are the most annoying people from YOUR college experience? I may do a part 2 to this in the near future.