Definitions by Christianaj

slacky 

A semi-erect penis.
More specifically a semi-erect, post-ejaculation penis.

That hole looks a bit small, maybe I could thumb in a slacky.

slacky by Christianaj July 20, 2008

slacky 

a semi-erect penis

suggestive of a penis which has partially lost turgidity after cuming

That hole looks a bit small but maybe I could thumb in a slacky

slacky by Christianaj April 16, 2007