jumped-up(redirected from jumped up)
slang Glorified. The phrase is used to describe someone who acts or is thought to be more important or powerful than they really are. Primarily heard in UK. I can't believe she's trying to tell me what to do, when she's just a jumped-up intern! These days, it feels like the prime minister is nothing more than a jumped-up headmaster.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.