Anyone who eats cooter. But, in most cases is used as another name for a lesbian.
See those two hot girls over there? I bet they're both SH5 cooterflap lickers.
Can be used as another name for vagina, or another name for the lips of the vagina.
That girl had abnormally large cooterflaps. They practically clapped SH5 in perfect rhythm when she walked naked across the room.