Billy Wong
A Billy Wong is when a male's underwear "rides up" until you can see the outline of the males penis. This is only happens if the guy is wearing boxer briefs.
"Dude I need new underwear. These things give me Billy Wongs for days."
Billy Wong
Billy Wong is an expression used to call someone names in front of their faces without them knowing.
Fyn: Bruh have you heard about Billy Wong?
Emi: Yeah, he's such a tard.
Emi: Yeah, he's such a tard.