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1.
KSM
KSM - Kill, Shag , Marry
- also Kiss, Shag, Marry

When three possible people are selected and you designate which you would Kill, Shag or Marry.
Can also be Kiss, Shag or Marry, if you want to be nicer.

For example, the girls from Friends:
Person 1: So, Monica, Phoebe and Rachel.KSM?

Person 2:Hmm. Monica Kill, Shag Phoebe and Marry Rachel, methinks.

Person 1: What??!Totally Marry Monica.
by LZL February 11, 2009
14 1
 
2.
KSM
To be implicated of an event that one may or may not have actually done. The KSM is in direct reference to Khalid Sheikh Mohammed, who under torture admitted to being the mastermind behing the 9/11 attacks.
"Dude, I heard you got KSM'ed for cheating on that math test!"...

"Dude, I didn't cheat on you! I'm sooo getting KSM'ed on this one."...

"I heard KSM stole the missing socks out of my dryer!"...

"Global warming was admitted to be caused by a KSM!"
by DaDornta April 01, 2007
13 10