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 biggestfailure or flop you have known.
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 bigtuna pizza to evan busch while grant craig mike dom and joe were having sex. it was a crazy orgy