Abbreviation of "awesem," a slang version of "awesome." used commonly on student film sets in the Chicago area to refer to something extremely cool or pleasing.
- "hey, the car mount is ready."
Sexually Enhanced Males
"Did you see that guy over there?"
"OMG yesssss, must have been a SEM"
The greatest person in the history of the universe, everyone who meets him wants to be him or be with him.
Man I wish I was Sem!
SEM: Self-centered Egoistic Maniac
A person who has the highest opinion for himself/herself that is very annoying.
Someone who is obsessed with himself.
Person #1: Look at her. She is obsessed with herself.
Person #2: She is such a SEM.
Sem: Semen Eating Monster
A ugly, fat, skanky, female. Most likely has some sort STD, like crabs or scabies. Likes to fuck anything with a penis. An outcast.
a) That bitch is such a SeM, its discusting.
b) Fuck that SeM and her skanky ass.
"I keep it crunk twenny fo'-sem!"