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1.
ikm
An abbreviation for "I know man".
It is a less feminine substitue for "Ikr?" or "I know right?".
Guy 1: "Damn Big Bob, that girl was all over you!"

Guy 2: "Ikm."
by BobTheBakr August 09, 2010
 
2.
I'll Kill My Self
A: Did you find anything?
B: No!
A: OMFG... IKMS
by .....:::::RIP::::..... July 11, 2008
 
3.
ikm
a response used when someone says something funny which you approve of. ikm MEANS 'iT kILLS mE'
Andy fell over. IKM!
by Seany C is me October 26, 2007