be off (your) chump

British, old-fashioned

to be crazy.

Don't listen to him. He's off his chump.

• to say nothing of
• to say nothing of something
• to say the least
• to see the back of
• to see the back of someone
• to see the back of something
• to someone's credit
• to someone's face
• to speak of
• toss and turn
• toss around
• toss around something
• toss hat in the ring
• toss off
• toss off something
• toss out
• toss out someone
• toss out something
• toss-up
• toss your hat in the ring
• to the bitter end
• to the bone
• to the contrary
• to the core
• to the fore