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: âLook at that giant girl over there, her shoulders are huge!â
Lucas âOh thatâs just Big Tunaâ
Katherine: âWhatever happened to Jim, I heard he was going to become a lawyer?â
Darrell: âNah heâs a Big Tuna, I think he moved back in with his mom.â