From the blues classic - slang for sexual availability.

"Free tonight?"
"I'm your tuna fish sandwich."
"I'm your tuna fish sandwich, spoon me on your bread.
I'm your tuna sandwich baby, best to eat in bed."
by Monkey's Dad February 20, 2023
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When someone eats out an individual with female reproductive organs that have not been washed in a long time, and it smells like tuna.
Taeler has a tuna cooch and loves eating tuna sandwiches
by GonorrhoeaGobbler June 22, 2023
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