Green’s Dictionary of Slang

second-rate, inferior, good only for fools.

1976		R. Price Blood Brothers 155: He knew there was something else out there beyond his teen-age friends and chump-change family.
1986		J. Ellroy Suicide Hill 13: And he had a chump change job at Midas Muffler.
1993		A. Rodriguez Spidertown (1994) 64: It was chump change work. It got him enough money so he could buy some lids and sell enough weed to pay his share of the rent.
2000		F.X. Toole Rope Burns 26: Do yourself a favor. Cross my name out of your chump-change address book.
2005		posting at news.thomasnet.com 18 Dec. 🌐 No one is willing to go to school and spend money to get a degree just to have some cheap S.O.B. company offer you a chump change job.