a smelly vagina that reeks like rotten tunafish.
Shanna hoodrat has a moldy tuna cat, but i still love her.
by Dmoney69 July 16, 2007
an extremly sexually active or "slutty as all hell" chick
"debra is such a tuna-cat she'd fuck anything that looked at her or offered her drugs"
by hello*kitty July 18, 2005
another name for pussy
Damn, you can smell that tunacat way over here.
by Shadycroft May 29, 2009