What does "expose oneself" mean?

To display one's genitalia in a public place or in other inappropriate circumstances.

Expose oneself

verb

verb ·Rare ·Advanced level

Verb

1
To display one's genitalia in a public place or in other inappropriate circumstances. euphemistic, idiomatic
"The police arrested the man who had exposed himself in public."
2
To put oneself in a vulnerable position. idiomatic
"The soldiers exposed themselves by moving into unfamiliar territory."

"The police arrested the man who had exposed himself in public."