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1.
Originallly developed in the late '90s to replace the word "Cock". The current spelling was adapted to present a Politically Correct version, of a favored slang term. The end result is a socially acceptable version, which remains acceptable in all situations, while not sounding lame such as: Penis, Groin, Dick, or Blue-Rare-Man-Meat.
"You are a Khak-Mongrel"
"How about a nice slice of khak"
by D-i-Z August 29, 2005
 
2.
The penis of a man of middle eastern origin.
Jasmine sucked Mohammed's khak.
by Jamal Pakao September 19, 2004