A sea slug is a broad term of marine invertebrates (many are unrelated) that resemble slugs. It encompasses flat worms, bristle worms, nudibranches, sea cucumbers, sea hares, and pulmonates.

Sea Slugs are the almighty race and are superior to all of humanity in every way shape and form. Their race is the one true God and all should pray to them and they will send you to an eternity of hell if you won't. Also known as jelly slugs.

One of those freakishly huge double-sided dildos.

An uncircumsized penis that smells of sea food.

Sloppy sea slug; The act of covering your cock in socks left in cum filled gloves that have been kept in a bucket of piss for the past two weeks.

A salvadorian sea slug is when a male or female defecates in recipients mouth and then the two participants exchange hard feces from one mouth to the other until the feces melts.

When a woman spreads the lips of her vagina while straddling the chest of her partner and drags herself down his chest leaving a trail of white slime. The shape of the labia looks like a swimming sea slug.