Contrary to what the other definitions say, a tattoo sleeve is a literal transparent elastic sleeve with a tribal pattern that goes around your arm and looks like a tattoo. Typically worn for disguise, to look cool, or as a joke.
Why would I get painful permanent tattoos when I could just buy a nifty pair of tattoo sleeves?
(Noun): short for "wookiee sledgehammer"; another term for an incredibly, almost unbelievably, large erect penis. Is so named due to the fact that its hardness and size could theoretically allow the owner (wookiee OR human) to use it as a sledgehammer.