twinyoo Share definition Flag Korean slang used in USA. It is an equivalent to Faggot or homosexual in English. Mainly used in the East Coast of USA. Korean 1: Anyoung man! Korean 2: Shut the fuck up you twinyoo. twinyoo by Alex Chon April 8, 2007 0 0 Get merch Get the twinyoo mug. Buy Now — $32.95 See more merch