do (one) a service(redirected from did a service)
do (one) a service
To help or aid one. Sharon did me a service by getting that jammed paper out of the printer.
See also: service
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
do somebody a/no ˈservice(formal) do something that is helpful/not helpful to somebody: She was doing herself no service by remaining silent.
Farlex Partner Idioms Dictionary © Farlex 2017