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..
ayon kay kksdjaj aas f a ika-01 ng Setyembre, 2006
2 more definitions
Moronic, stupid or slow witted, derived from the phrase "as slack as a bag of nuts"
That kid is a complete slacknut!
ayon kay Giggles595 ika-25 ng Hunyo, 2010
Nuts that are deprived of sexual intercourse therefore being "slacked" or "slacking".
Hey slacknuts, you aint got laid in months.
ayon kay Jerry Schlong ika-27 ng Hunyo, 2006