in one's underwear

idiom

: while wearing only underwear

He answered the door in his underwear.

Examples of in one's underwear in a Sentence

Recent Examples on the Web

To protest that some fairly improbable people, some people who could not possibly respect themselves, seem to sleep easily enough is to miss the point entirely, as surely as those people miss it who think that self-respect has necessarily to do with not having safety pins in one's underwear. —Joan Didion, Vogue, 22 Oct. 2014