顔かおを潰つぶす

expression, godan verb (-su)

make someone lose face; embarrass someone; make someone look foolish

Idiomatic expression meaning to damage someone's reputation or dignity, often publicly. The subject causes the loss of face; the object is the person whose face is lost.

• 彼かれは会かい議ぎで上じょう司しの顔かおを潰つぶしてしまった。

  He made his boss lose face at the meeting.

• そんなことを言いったら、彼かの女じょの顔かおを潰つぶすことになるよ。

  If you say something like that, you'll embarrass her.