off your trolley
off (one's) trolley
Crazy or insane. When he told me about his plan to renovate the old, condemned house, I immediately thought he was off his trolley. You must be off your trolley if you think you can lift that heavy box by yourself.
off your trolleyBRITISH, INFORMAL
If someone is off their trolley, they are behaving in a crazy way. If they think officers are going to give up their cars, they're off their trolley. Most people think I'm off my trolley, but I've never been so sure of anything in my life.
off your trolleycrazy. informal
The trolley in this case is a pulley running on an overhead track that transmits power from the track to drive a tram; the idea is similar to that in go off the rails (see rail).
1983 Nathaniel Richard Nash The Young and Fair If you suspect Patty, you're off your trolley.
off your ˈtrolley(British English, informal) crazy; stupid: He’s completely off his trolley!
This idiom is similar to ‘go off the rails’ but refers to a tram (= a vehicle driven by electricity than runs on rails in the street) that has become disconnected from the power in the overhead track.