A big gay bear. A man who lifts up other mens' shirts, in order to gain a view of their exposed chests, from which he will glean homoerotic pleasure. He may store this image in a "mental wank bank" to assist him in masturbation at a later date.
"I'm a shirtlifter.I lifted up Phil's shirt. He has a gorgeous hairy chest. Ummmm."
"Hey lads, this isn't really my idea of skiing. I think I'm going to take off my skis and walk down."