Alternative spelling: Kum-bucket
1) A girl who people have sex with because their easy and are usually not very attractive
2) An aggressive homosexual man who simiple wants to have as much bucket sex with other people as possible whether their unwilling or not
However, this can used against anyone as a general insult
1)"Dude, you're mum is such a cum-bucket"
2)"Stop touch my butt you cum-bucket"