chump

A tiny, trifling, and/or inconsequential amount of money. To most people, $2,000 is a lot to spend on anything, but to the country's mega rich, it is merely chump change. I'm only getting paid chump change for all this hard work I'm doing.

To be crazy. In the UK, "chump" is a slang term for "head." Primarily heard in UK. You're off your chump if you think that plan will work.

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

A trivial sum of money, a trivial matter. For example, Dave was sick of working for chump change; he wanted a decent salary, or Don't put that on the agenda; it's chump change. This expression uses chump in the sense of "a fool or sucker who should be ignored." [Slang; 1960s] Also see chicken feed.

Also, off one's nut or rocker or trolley or chump . Crazy, out of one's mind, as in You're off your head if you think I'll pay your debts, or I think Jerry's gone off his nut over that car, or When she said we had to sleep in the barn we thought she was off her rocker, or The old man's been off his trolley for at least a year. The expression using head is colloquial and dates from the mid-1800s, nut has been slang for "head" since the mid-1800s; rocker, dating from the late 1800s, may allude to an elderly person falling from a rocking chair; trolley, also dating from the late 1800s, may be explained by George Ade's use of it in Artie (1896): "Any one that's got his head full of the girl proposition's liable to go off his trolley at the first curve." The last, chump, is also slang for "head" and was first recorded in 1859.