a girl with abnormally large tits, generally a friendly term said jokingly. She doesn't show them off though, and is very modest. Titzilla's a pretty good friend to have around. She's kind of a spaz though. But you like her anyways.
Girl 1: Hey, Titzilla!
Girl 2: I will end you.
A primate or an ape with gigantic boobs that even Godzilla itself could not handle.
OH SNAP! Titzilla is walking towards my direction....(time to pull down my pants).
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A guy with abnormally large nipples. This name is usually used during a childish name calling fight. Also can be used to describe a guy that is a major douche who happens to have large nips.
"Whoa! Calm down titzilla!"
"Everyone look out titzilla is on the loose!"
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