when you see the huchachas walkin into the function
*huchacha walks in*
fui fui fui fui fui.
Fucked up individual. Usually someone who has done something that is viewed as socially or morally wrong.
Did you hear about Eric beating the hell out of Cam last night? He's in the hospital and he might never recover! Damn, what an FUI.
The old gym teacher got caught with illegal pornography on his computer. I always knew he was an FUI.