UDEK
Short form for U Dont Even Know. Also pronounced U-DECK to troll people.
Guy #1: UDEK
Guy #2: Wtf man I Deck?
Guy #1: LOL UDEK SO HARD
Guy #2: WTF are u talkin about
Guy #1: UDEK about UDEK
Guy #2: Wtf man I Deck?
Guy #1: LOL UDEK SO HARD
Guy #2: WTF are u talkin about
Guy #1: UDEK about UDEK