Typically a typo made by iPhone 4 users because their phone screens are so pathetically small
iPhone 4 user: I love YoY
Decent phone user: lol, "YoY"
iPhone 4 user: fuck sake, shitty keyboard
by xbox_bash May 16, 2015
The ethereal being of all creation. YoY sees everything and quietly listens to the soundtrack of Thomas the Tank Engine. YoY looks like a train with a long human nose. YoY stands on two stick figure legs and has no arms. Some followers refer to YoY as the second coming. Those who choose not to believe in the great YoY will be subjected to eternal damnation in the fiery pits of Hell. YoY chooses to abandon institutionalized religion and rather seeks salvation from within. Join YoY on its quest for eternal domination of all that exits.
A quick search on Google Images will provide you with an illustration of YoY.
All praise YoY! Our founder, our love, our inspiration.
by sami20008 May 9, 2018
An interjection, used to show a positive feeling or to exlaim excitement.

1) "Yoi!"
2) "Party tonight, yoi"
3) "Yoi, how are ya?"
4) "I'm great, yoi!"
5) "I've won the lottery, yoi!"
by ComplexSimplicity. April 12, 2009
YOI is the acronym for the ice skating anime, Yuri!!! On Ice. It tells the story of the career of a competitive ice skater, Yuuri Katsuki, and his attempt to redeem himself from previous his failures. All while dealing with budding relationship between him and his coach Viktor Nikirov.
"YOI is the best thing I ever watched!"
"IKR I really ship Yuuri and Viktor"
by Ninja Dragoness January 17, 2017
A word used to describe a common effect used in dubstep production.
Yoooooooooooooi yoi yoi yoi yoi yoi yoi yoi yoi (The opening line of the second drop in Skrillex's track "Rock and Roll (Will Take You to the Mountain)"
by Wompborn September 21, 2011
A word used to express agreement or satisfaction with either a statement, question, or idea. Can also be used simply to express excitement.
Slim Jim: Hey Fat Joe... is this bud dank or what?

Fat Joe: Yoy!
by Toke-A-Tron November 30, 2010