think one's shit doesn't stink

卑語

(vulgar) To be arrogant or overconfident.

日本語の意味

自信過剰で、うぬぼれた態度をとる / 自分を過大評価し、他人を見下す

Don't tell him anything — he'll just think one's shit doesn't stink.

彼には何も言わないでください。彼はすぐに自分は他の人より優れていると思い込むだけです。

意味（1）

(vulgar) To be arrogant or overconfident.

thinks one's shit doesn't stink

（ present singular third-person ）

thinking one's shit doesn't stink

（ participle present ）

thought one's shit didn't stink

（ participle past ）

thought one's shit didn't stink

（ past ）