noun
chump
CHUMP/tʃʌmp/
A foolish or easily deceived person.
The dishonest dealer treats the trusting customer as a chump.

Etymology
Chump first meant a short, thick lump of wood, then acquired the insulting sense “blockhead.” That wooden-block image connects it with foolishness, but its deeper origin remains uncertain.
In context
and helped deliver if you immediately think of the biggest thing you possibly worked on and sort of implicitly take full credit for it you're going to look like a chump
More examples
- Don't be a chump and pay twice for the same ticket.
- The scammer treated his customers as chumps.
- She called herself a chump for trusting the forged receipt.
Forms
chump · chumps
Similar words
- fool
- The broad term for someone acting unwisely.
- sucker
- Especially someone easily tricked.