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Kmn is internet slang for "kill my nephew."
kmn by H0t Twinkle Toes December 23, 2016
Related Words
KMN KMNB kmnba kmneg KMNFML kmnop KMNP Kmnpat diana_kmn04
Initials used in the form of an insult when replying to any kind of banter, standing for "Kiss My Nuts" usually heard in the Rockfield area of South Wales.
"Do me a favour and tell slim to KMN"
KMN by Jemahh July 23, 2014
A suicidal acronym for "Kill Me Now," basically the opposite of KYS (Kill Your-Self) .
"Dude, Karen just said that she wouldn't be caught dead fucking with you."

"KMN."
KMN by Alpha_Intel June 17, 2018
KMN: An abbreviation for "Kill Me Now." Generally used to describe cancerous sites.
KMN by The Deer Leader May 2, 2017