garter snapper means: A term that was popular in the 1920s-1950s and refers to someone who has had sex with multiple women, or has had many one-night stands. This is the time when “garter snapper” was popularized. Garters were worn by women to keep their tights up, so someone who “snaps” garters often takes them off. It’s a common act during an affair or sex. (in Community Dictionary, added by Aitor Santana)