メンツ丸つぶれだ。

めんつ丸つぶれだ。

I have lost face completely.

メンツ丸(まる)つぶれだ。

Mentsu marutsubure da.

面桶 (めんつう、めんつ)

round box for apportioning individual rice servings

丸つぶれ (まるつぶれ)

complete ruin; collapse; losing (something) completely (e.g. face)

だ (だ)

be; is; indicates past or completed action; indicates light imperative

Readings: ガン、まる、まる.める、まる.い

Meanings: round, full (month), perfection, -ship, pills, make round, roll up, curl up, seduce, explain away