pk 

short for "pain killer"

as in opiate prescription drugs.

Yo man, lets go down to nyack and pick up some pk's.

pk by mr. dont worry about it September 5, 2005

PK 

The word PK is an abbrieviated word which stands for PRETTY KENTS - this word which originally derrived from hardcore girls in Melbourne and started off as a crew and now is used world wide.

oh shit son, its namcy, anjoolah, lisa, leenah & annete they're such pk's i envy :(

PK by FULLEHSICKULEH December 27, 2007

pk 

An abbreviation for psychokinesis.

i just moved that psiwheel with pk

pk by burnedemon August 22, 2007

pk 

To player kill;
usually used in the game called Runescape.

Dude, let's go pk some n00bs!!!

pk by afda June 9, 2007

pk 

abbreviation for pain killer

SWIM blew a couple PKs and went to la la land

pk by PKpopper May 7, 2009

PK 

Acronym for "popular kid" that originates in Mt. Lebanon, Pennsylvania.

She won't hang out with us anymore...she's a PK now.

PK by dictiondoll October 21, 2010

PK 

Term used in sexual combat during the early 1400's. To PK means to thrust ones sexual member towards the opponent, usually causing injury, or temporary blindness. The winner of this centuries old game often PK's the loser of the match in the face. The final PK usualy contains seminal fluid or urine.

That bitch, she took my money when I was sleeping, and then PK'd me in the face.

PK by Patrick May 13, 2005