do somebody/yourself an injury

do (oneself or someone) an injury

To do something that harms or injures oneself or someone else. You'll do yourself an injury if you keeping riding so carelessly. You sure did your brother an injury by including him in that dangerous game.
See also: injury
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

do yourself an injury

suffer physical harm or damage. informal
See also: injury
Farlex Partner Idioms Dictionary © Farlex 2017

do somebody/yourself an ˈinjury

(often humorous) hurt somebody/yourself physically: I nearly did myself an injury carrying those heavy suitcases.
See also: injury, somebody
Farlex Partner Idioms Dictionary © Farlex 2017
See also: