A slut who moves from boyfriend to boyfriend with ease; being single for no longer than a couple weeks at a time. Interestingly enough, each one of these sluts labels her own promiscuity as "un-slutty" having only slept with one who is technically defined as her "boyfriend": Usually extremely attractive, incredible in bed and down to get dirty do to constant sex.

One who jumps from relationship to relationship willy-nilly with the intent of hooking up. Sort of like underwear. Backups can be called upon at any time.