(someone) is not going to thank you for (something)(redirected from one's not going to thank)
(someone) is not going to thank you for (something)
Someone is going to be very displeased about something you've done. I'm telling you now, Janet isn't going to thank you for speaking to the boss on her behalf. You can go ahead and paint the living room, but they aren't going to thank you for it.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.