donkey punchのようなどんな単語でも探してください。
 
1.
Visable collection of navel (belly button) fluff. Usually created by the coming together of a natural fibres (such as wool) and a large sweaty belly.
My, you've got a lot of bulff in there, that's disgusting.

David Bowerによって 2008年04月14日(月)

Words related to Bulff

belly button bulf fluff navel navel lint