Definitions

1. noun

the small depression at the center of the abdomen, usually considered a feature of the navel

“She showed off her bellybutton ring at the party.”

2. verb

to make a small hole or incision in the navel, typically for the purpose of displaying a ring or other ornament

“She decided to bellybutton herself for her birthday.”

3. verb

to be proud or show off one’s stomach, especially in a way that is considered unseemly

“He’s been bellybuttoning it for years, and it’s starting to get old.”