put your foot in it

Từ điển Oxford Advanced Learner 8th

put your ˈfoot in it idiom
(BrE) (also put your foot in your ˈmouth NAmE, BrE)to say or do sth that upsets, offends or embarrasses sb
•I really put my foot in it with Ella— I didn't know she'd split up with Tom.
Main entry: ↑foot_idiom