chump /tʃʌmp/ BrE AmE noun [countable]
[ Date: 1800-1900 ; Origin: chump 'thick piece of wood' (18-19 centuries) , perhaps from chunk + lump ]
1 . informal someone who is silly or stupid, and who is easily deceived
2 . chump chop/steak British English a thick piece of meat with a bone in it