1. A vagina of rather large proportions. A huge clit.
That pussy was so huge, it was like Twatzilla!!
When the simple insult of "twat" just isn't enough.
"WTF is with that bitch! She went from zero to FUCK in 2 seconds. She's a raging TwatZilla!"
A pet name that girlfriends call each other, an extension of twat and godzilla. Not appropriate for a man to call a woman. Strictly for the female friendship relationship.
"Hey twatzilla.... how was your night last night? Did you see Jim?"
Noun; an adult male who likes dominance like Godzilla, but is actually a twat; as he controls and abuses his former female companion and never allows her to better herself
Guy: wanna go on a date this weekend?
Girl: I don't know, twatzilla may not be able to watch kids this weekend