he, she, etc. won't thank you for something
(someone) won't thank you for (something)
Someone is going to be very displeased about something you've done. I'm telling you now, Janet won't thank you for speaking to the boss on her behalf. You can go ahead and paint the living room, but they won't thank you for it.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
he, she, etc. won’t ˈthank you for somethingused to say that somebody will not be pleased or will be annoyed about something: John won’t thank you for interfering.
Farlex Partner Idioms Dictionary © Farlex 2017