A large, ungainly girl (tall, well built than fat) who appears a bit dumb and/or clutzy, not particulary
attractive. Or perhaps a girl who is a bit too big to be completely feminine, like Kimora Lee Simmons. Basically a girl whose physical presence is vaguely
reminiscent of that hulking, slow-witted animal,
the moose, which lacks the grace of something like a stag.