Lightswitch Gremlin
"Don't turn on the light, don't turn on the light!" Any female who appears attractive at the end of the night, but whose true form is revealed by proper lighting.
Yeah so Gina, right. She was slammin' at the club, right. Then i brings her home and was takin' her to town, right. Then Tommy bursts in the room and turns on the light, right. He's all like, bro-man, that bitch is a lightswitch gremlin!