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4.
su
A way to say "Shut Up" on AIM or AOL Instant Messanger.
Person 1: UKFdhghgbvufbhdfbjk

Person 2: su

Person 1: =... wait what?

Person 2: ahahahahha
by sheelajdbnsauidb March 25, 2009
 
1.
su
calling of the Wu-Tang Clan
On behalf of my crew, SUUUUUUUUUUU, Enter the Wu
Thirty-Six more deadly Chambers, to take you through
by killah beezz June 27, 2010
 
2.
su
nickname for syracuse university
SU has a really good basketball team.
by jpp133 November 02, 2007
 
3.
SU (said 'S-U', not 'sue')stands for socially unacceptable. It is mainly used as an interjection or adjective to describe things that are socially unacceptable, weird, bizarre, or simply inappropriate in a give situation.
Did you just ask that complete stranger to rate your ass? S.U.!

That girl is such a freak. All I have for her are two words... S.U.
by K,K&S April 07, 2007
 
5.
s.u
SU (said 'S-U', not 'sue')stands for socially unacceptable. It is mainly used as an interjection or adjective to describe things that are socially unacceptable, werid, bizarre, or simply inappropriate in a give situation.
Did you just ask that complete stranger to rate your ass? S.U!

That girl is such a freak. All I have for her are two words... S.U
by K,K&S April 29, 2007
 
6.
su[
Yet another internet typo slang word. This one is for the word "sup", a shorter version of the popular greeting of "What's up?"
"Su, fool"
by JT May 03, 2003
 
7.
SU
Another way to say "Straight Up".
"TLPC is an awesome band"

"Yo SU"
by TLPC February 26, 2014