Literal translation
to be a bit crazy
Meaning
to be a bit foolish, briefly unreasonable
Explanation
The word momò comes from a root mom meaning child, also found in the French môme. The shift from young child to foolish, unreasonable is easy to follow: children are seen as innocent and naive. To be un pau momò is to be slightly foolish, temporarily unreasonable. The phrase is often used as a question meant to dissuade someone from a rash plan: mais ti es pas un peu momo. It is lighter than fada or couillon, and far short of outright madness.