welly in the mud

Best definition
welly in the mud
Describing a big fat sloppy pussy. So called because when you fuck one of these mush buckets, it sounds just like a welly in soft mud.
Dude 1: “That fat chick you used to go out with. She was good in the sack?”

Dude 2: “Yeah, real juicy – man she sounded like a welly in the mud some nights!”

Dude 1: “Awesome!”