mpk 

Created in MMORPG to describe the act of releasing monsters onto a player in order to K.O. them.

(Monster Player Kill)

Guys, be careful, they plan to MPK us.

mpk by Sunburntshadow November 2, 2004

MPK 

Many People Know

Did you hear what she did? Now MPK. That's sucks bro.

MPK by KomatoseBandit August 9, 2019

MPKH 

The abbreviation of "My Pleasure Knob-Head"

A common term used when addressing condescending or smart arsed people.

1: "When are you going to finish?"
2: "In 16 minutes and 37 seconds."
1: "Do you want a lift or not?"
2: "Well I'm not going to say no..."
1: "MPKH!"

MPKH by Racist Youth-in-Asia April 26, 2017