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1.
when some is slacking off or doing a bad job..
haha look at george being a slack nut no more weed for him it make him.. i think hes gay.... yeah look how hes fondaling mr.shanks over there..
by kksdjaj aas f a September 01, 2006
6 4
 
2.
Moronic, stupid or slow witted, derived from the phrase "as slack as a bag of nuts"
That kid is a complete slacknut!
by Giggles595 June 25, 2010
1 0
 
3.
Nuts that are deprived of sexual intercourse therefore being "slacked" or "slacking".
Hey slacknuts, you aint got laid in months.
by Jerry Schlong June 27, 2006
4 4