Abbreviation for "you know me". Normally used as a response to UDM
Jack: I hear you and Zoe got it on last night! UDM brah!
Ryan: yeahhh man! UKM
by FjbP November 17, 2011
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Abbreviation for "Ultimate Killing Machine".

Like you're going to "kill it", like becoming super human.

by CEOUKM March 29, 2022
John: Hey, I see you've been running for an hour every day!

Jake: Yeah, just completed 100 days.
John: Whoa! You're the UKM Jake!
by CEOUKM March 29, 2022
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