A vagina that's extremely loose usually do to the fact that the woman has frequently used extremely large dildos, or possibly had sex with a man who was hung like a t-rex.
Kayla is a freak but she has a busted cunt because she loves huge dildos.
to kick or punch in the cunt
Uma Thurman cunt busted that bitch in that movie "Kill Bill"
Australian slang for "Shut the fuck up" commonly followed by "my buddy". Do not take this as a personal attack
Craig: "Your missus is a bitch
Ben: "Bust your cunt my buddy"
Example 2
Seth: "You cant even pull good cones pussyhole"
Caiden: "Bust your cunt"