chunky tuna 

a fat girl, or used when refering to her vag

hey bro, here comes some chunky tuna!

you get a taste of her chunky tuna last night?

chunky tuna by tj April 20, 2005

Tuna Chunk Dunk 

The act of imbedding your dick in a funky old cunt.

This chick must not have showered for 3 days so it was one funky tuna chunk dunk.

I gave that chick one hard tuna chunk dunk.

Tuna Chunk Dunk by Weezer2 October 24, 2007