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1.
A very lovely sweet girl who loves to laugh and sing. She is known to cheer people up or make their day with just her smile.Very beautiful unique girl with a unique name. You will never find a more special girl than Yatzi.
Guy: "Wow Yatzi is so beautiful!"
by Iloveher123456 January 21, 2012
 
2.
Someone you should seriously not consider f-ing with. Generally considered mentally unstable.

If you have to ask "what's a Yatzi?" than you should just throw yourself off a building.
"I wouldn't mess with him"

"Why the hell not?"

"that's Yatzi"

"What's a Yatzi?" (followed closely by the sound of body plummeting 60 stories - SPLAT!)
by mrs. yatzi June 25, 2010