Lump it! - Idioms by The Free Dictionary
An expression of annoyance and dismissal of someone or something. It means the same as "Forget it!" Well, you can lump it because I'm not staying late to help you—that project is your responsibility!
Inf. Forget it!; Go away! Well, you can just lump it! Lump it! Drop dead!
References in periodicals archive
Some with more clout are getting 3pc, but others have apparently been told to like it or lump it
After 12 years of marriage you get to like everything -or lump it
In a way I felt sorry for the poor chap at the Deva Stadium because he actually said before the game against Grimsby that he was acting under orders in pumping up the volume and if we didn't like it, we could lump it
In the match programme, every action pic was of someone trying to head a high ball or just about to lump it