look up any word, like blumpkin:
 
2.
YSI
You Stupid Idiot
You spent your savings on lottery tickets and scratch cards?? YSI!!

YSI! Everyone knows Mitchel is an SI!
by Mitchelnext December 18, 2011
 
1.
ysi
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Person 1: I need this song.
Person 2: I'll ysi.
by Absinc September 29, 2005
 
3.
YSI
YSI

You Said It
A: Better than nothing

B: YSI Bro
by ty7711 March 09, 2014
 
4.
Ysis ysis is a girl that boys love. shes the type of girl that no one seems to know the wrod for. shes not that big up top but has a nice ass shes a flirt,a total virgin, and has never had a boyfriend. shes smart pretty and intelligent.she has a little to much mouth and attitude but is krazy and goofy and loud. she also outgoing fun to be around and a boy magnet. most boys think this type of gurl is so perfect that they dont even have all the words to descide her so they would just call her an Ysis. lots of southern people use this word.
"cooper, did you see that gurl in 6th period?"

"yah, she was so Ysis."
by southern_gurl May 19, 2009