Get over being ratty (5)
I believe the answer is:
cross
I believe this is a triple definition!
'get' is the first definition.
(thesaurus)
'over' is the second definition.
(thesaurus)
'being ratty' is the third definition.
(thesaurus)
(Other definitions for cross that I've seen before include "Put out" , "Short punch in boxing" , "Go to the other side" , "Angry; shape" , "Thwart, oppose" .)