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It Stands for shoot, stab, kill. Made popular by 50 cent
"...S.S.K. program...Shoot, Stab, Kill nigga"
-50 cent in the song "Do it Myself" by Young Buck
by B-sox February 26, 2008
Abreviation for the notorius "Subi Shenton Klan". Founded in 2001, the "klan" is a grouping of gang members within the Shenton Park and Subiaco suburbs.
"Damm man, my house just got burned down"
"My god, look at that tag, looks like the work of the SSK"
"Now where will i make my pop-tarts!?"
by Jaketh August 25, 2006