Lunker

[Sarah]

An enormous turd left in an unflushed toilet.

[Julene]

a large fish

[Dave Paprocki]

Originally meant to describe the biggest fish in a given body of water, also refers to a larger than average sized penis.

[Sarah]

Though the original meaning is Big fish, Lunker has been used in many circles when refering to big Women, specifically those you may meet in a bar or night club.

[Dianne]

A turd left in bed by a non-resident after a one night stand.

[Monty]

An exceptionally large specimen of something, in particular (among anglers) a fish.