Значение идиомы off one’s rocker
[off one’s rocker] or [off one’s trolley] {adj. phr.}, {informal}Not thinking correctly; crazy; silly; foolish. Tom is off hisrocker if he thinks he can run faster than Bob can. If you thinkyou can learn to figure skate in one lesson, you’re off your trolley. Syn.: OUT OF ONE’S HEAD.