1 definition by Billybob the banksiaman
A term given to someone, usually a small child, when they are acting in a completely phsycotic or hyper-active manner. Used in a affectionate way.
- Small child is running around in circles laughing at his/her own fart
- Onlooker: Oh you filthy mongrel!
- Onlooker: Oh you filthy mongrel!
by Billybob the banksiaman November 5, 2007