a name to call someone, usually as a put down. Used along the same lines as whomp
Can also be used in place of a cussword like shoot or crap
1. Shut up and eat your green beansyou stupid muttball.
2. Stop pooping your pants, you're acting like a muttball.
3. Ah MUTTBALL, I just locked my keys in my car!!
adjective: commonly used when the communicator is multiracial (a mutt) or, by, about, and for things multiracial. Always in positive usage, never derogatory.