Top Definition
Acronym for "you sicken me". Used mostly in online chat.
John: I got with Jane last night.
Chad: Who, the fat bitch from that club?
John: Yeah.
Chad: YSM!!!!
by MrKapper November 27, 2005
A lifestyle.

Yee Slap Mob
You Suck Me
Young Sly Mothafuckas
Your SMoking Mama
Young small muthafuckas
young sly masturbators
yeah, smoking marijuana
young steamy men
You sicken me
Young, sexy, and miraculous
Sum hoe: Yo YSM, can I have your autograph?
YSM: No, but You can Suck Mine...hoe
by Djizzle77392 April 24, 2010
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