off one's trolley
idiomPart oftrolley
off one's trolley — idiom
1. Behaving in a foolish, confused, or mentally unsound way.
1.idiom
Definition
Behaving in a foolish, confused, or mentally unsound way.
Example
You must be off your trolley if you think I will pay that much for a used bicycle.
Grandpa started talking to the television again — the nurses say he is completely off his trolley.