Related Clues:
- Lint-collecting navel
- Outie's opposite
- Protuberant navel
- Convex navel
- Umbilical concavity
- Navel variety, familiarly
- Protruding belly button
- Protruding navel, in slang
- Midriff protuberance
- Concave tummy part
- Concave bellybutton
- Tummy protrusion
- 'Button' that's plainly visible
- One of a select group
- Umbilical variety