A sampling of the vocabulary I have picked up while working in East Los Angeles, with proper usage illustrated by real student quotes:
DOWN (adj.): cool, good, great. May be enhanced by the addition of –assed.
“That is one down-assed bike!”
COME OUT (v.): be seen in, appear in.
“Yo, did Kid Cudi come out in that song?”
1. (adj.) Bad, uncool
2. (interjection) A word used to express general disapproval
“This essay has to include three sources?! Broke!”
1. (v.) to fight, compete
2. (interjection) a phrase used to challenge another person
“You think can play chess? Step up, fool!”
1. Well-dressed, stylish.
“It’s free dress tomorrow, so come fresh.”
“Mister, I thought you said we were supposed to have one glass of salt water and one glass of fresh water, but these are both warm.”
Some words I reasonably expected my students would know, but many don’t:Increase, Decrease, Data, Statistic, Ratio, Free (in any usage other than gratis), Power Plant, Biology