A nymphomaniac. A woman who loves sex so much that her
cunt is almost always red and swollen. The snapper part of the expression referring to how tight and eagerly her
cunt seems to snap shut on cock. Also in part a fisherman's pun in that red snapper fish do not let
go of the bait easily even after being hauled aboard the fishing boat (in this case the worm is a cock). Red snapper is also a tasty
fish dish.... Thus again referencing very agressive nymphomaniac behavior.