sharp-elbowed

sharp-elbowed

Especially aggressive in advancing one's own interests, usually while ignoring how doing so affects other people. Holly has always seemed sharp-elbowed to me, so I'm not surprised she undermined you to get that promotion. You've got to be sharp-elbowed if you want to get ahead in this industry.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.