Definition of mooner in US English:

mooner

noun

  • 1Informal. A person who moons or idles about.

  • 2Slang. A person who exposes his or her buttocks.

Origin

Late 16th century (in an earlier sense). In sense 1 from moon + -er, after post-classical Latin lunarius, itself probably arising from a misreading of limarius. In sense 2 from moon + -er.

Pronunciation

mooner

/ˈmuːnə/