go off (your) trolley

be off (your) trolley - to be crazy.

Has he gone completely off his trolley? He'll never get away with it!

• as nutty as a fruitcake
• a sob story
• a social climber
• a softly, softly approach
• as old as the hills
• a soldier of fortune
• as one man
• a song and dance
• a son of a bitch
• a son of a gun
• as opposed to
• as opposed to something
• a sore point
• a sore spot
• a space cadet
• a spark plug
• a spin doctor
• as pissed as a fart
• as plain as day
• a sporting chance
• a square meal
• a square peg
• a square peg in a round hole
• as quick as a flash
• as quick as a wink