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1. (verb) The act of being or doing something awesome.

2. (adj.) "Cool!" - Usually said in response to something.

3. (int.) "Oh no!" - Usually spoken in a distressed tone of voice.
1. "Woah, he just did a triple backflip. That dude's yoin."

"You, sir, are yoin."

2. Jake: "Oh my god, I just murdered that zombie!"

Mike: "Yoin!"

3. Chris: "Yo, Terrence! Look out for that shark, dawg!"

Terrence: "Yoin!"
by Fiasco2117AD September 14, 2010