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1.
KST
A group of kid's from a small town who know they down. also stands for kids who smoke tree's and it is "tsk" backward's and they are there rival's.
I BANG WITH KST!
by lowlow55 May 04, 2009
 
2.
KST
Keep your Shit Together
Dude you're so drunk, you definitely need to KST it!
by KST LADIES 05 February 15, 2006