Originally from Eishanhower Junior High School, it is referred to an ugly person. This word is mainly used humorously when a friend or someone does something funny.
"Did u see Timmydancing"
*timmy starts dancing*
"Ew his uglasss look like a deformed foot"
Short for "ugly ass." Often used when roasting a stupid or, obviously, ugly individual.
Tyrone: Aye yo, Jerome! I just copped me the new Skechers Z-Straps, my nigga!
Jerome: Boy, Tyrone, if you don't sit yo uglass down somewhere and take them whack ass Payless shoes with you.