Definition of mosy in English:

mosy

Pronunciation /ˈməʊzi/

adjective

dialect
  • 1(chiefly English regional). Of fruit, vegetables, etc.: mouldy, decayed, rotten; overripe; tough.

  • 2(chiefly English regional). Confused, bewildered; out of sorts; fuddled through drinking alcohol; foolish, stupid.

  • 3(now chiefly Newfoundland). Of the weather: close, damp, muggy; misty, foggy. Of the moon: concealed by haze, indistinct.

noun

dialect
  • (now chiefly Irish English). An idiot, a fool.

Origin

Late 15th century (in an earlier sense). From moss + -y.