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8.
Someone who masterbates while on marijuana
"Man I was a weedwacker last night"
by Jonathin Smith December 09, 2009
 
9.
Someone who jacks off while really high in order to make their orgasm super awesome.
"Hey, where did Jerry go after we smoked that blunt?"
"Oh, he's in the bathroom. He's a Weed Wacker."
by BeauFIndley May 02, 2010
 
10.
a weapon that "cuts down the weeds" normally a weapon with rapid fire
e.g Ak47 , semi automatic
dem bwoi wa fi par wid me?
me a draw for the bludclart weed wacker
me a chop dem up like a steak!
by Th3 Beast January 06, 2010