This term refers to a girl who is bad in bed.
John: Hey dude, how was fucking Janice?
Billy: Aw man, I got off, but she is a boring tuna.
by speach December 09, 2009
Tuna without added vegetables or other seasonings and/or flavorings that have been chopped and/or prepared by the Slap Chop.
"Stop having a boring tuna. Stop having a boring life."
by BWallenstein May 30, 2009

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