this is when you take a slice of pizza(whatever kind you want) and you take and put it up a girls vaginas so that way your penis can fit into the pizza. this increases the orgasm, the grease is a good lube, and the pizza taste even better after
i did the big tuna pizza to evan busch while grant craig mike dom and joe were having sex. it was a crazy orgy
by ginganinjaistheman September 27, 2010
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A play on the term "big kahuna," denoting a self-serving, self-righteous narcissist who wallows in delusions of grandeur.
I am the big goon tuna. I am a god, a legend, a virtual genius, and the epitome of moral rectitude.
by '52 Broadcaster September 24, 2006
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The biggest, tallest and loudest person in a group of individuals. Mostly known for their size, however one might also be called Big Tuna, because they are the biggest failure or flop you have known.
Nathan: “Look at that giant girl over there, her shoulders are huge!”

Lucas “Oh that’s just Big Tuna”

Katherine: “Whatever happened to Jim, I heard he was going to become a lawyer?”

Darrell: “Nah he’s a Big Tuna, I think he moved back in with his mom.”
by _gbangz November 23, 2021
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