transitive verb
1. : to batter or handle roughly : beat , maul
wanted to get there in time to muss him up a bit — J.F.Fishman
2. : to make chaotic or incoherent : confuse
sold them liquor, and generally mussed up the situation — William Kent
transitive verb
1. : to batter or handle roughly : beat , maul
wanted to get there in time to muss him up a bit — J.F.Fishman
2. : to make chaotic or incoherent : confuse
sold them liquor, and generally mussed up the situation — William Kent
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012