its a meme thats popular on a game called Age Of Empire II: Definitive Edition
the phrase means "you can do it", firstly introduced by Vivi aka Fat_Dragon on a team match with TheViper
TheViper got rainbowed on his base

TheViper: "I'm ded, wheres my teammate??"
Vivi: "U CAN OK"
by blvrry666face April 28, 2021
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