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1.
A slang term for man-milk, otherwise known as sperm or semen, or any other milky discharge from a male's penis.
Dude... that better not be spilk in my coffee!
by j777 October 29, 2008
 
2.
Sprite and chocolate school-lunch milk
hey Ronnie check out this spilk I just mixed!
by jeNN December 08, 2003