when you have been fucked over or screwed by someone else...with our without knowing it...
John got two tickets from the police, he got his ass moused bad...
by theman1968 March 12, 2010
1 more definition
To be tampered with or eaten by a rodent(s).
Those Doritos have been moused. Don't eat that, its been moused. Oh shit, the couch has been moused!
by Wisker Biscuit June 06, 2009