A whore, who smells like fish. Tries to steal everyone's boyfriend, has a million STDS, wears skanky clothes and thinks she's hot, often referred to as a walking STD (aka her identifier) tends to have an awkward smile and no one likes her.
Guy: Did you see that girl at the party last night?
Other Guy: Yeah dude she was a Maggie
Guy: More like a grenade but whatevs