unwaith yn y pedwar gwynt

Welsh

Etymology

Literally, once in the four winds.

Phrase

unwaith yn y pedwar gwynt

  1. (idiomatic) once in a blue moon, very rarely
  • bwyta uwd â mynawyd (to herd cats, literally to eat porridge with an awl)
  • tan ddydd Sul y pys (when pigs fly, literally until the peas' Sunday)
  • pan fydd yr Wyddfa’n gaws (when pigs fly, literally when Snowdon is made of cheese)
  • pan fydd Nadolig yn yr haf, a gwsberis yn y gaeaf (literally when Christmas will be in the summer and goosberries in winter)
  • pan fydd uffern yn rhewi drosodd (when Hell freezes over)
  • unwaith yn y pedwar amser (once in a blue moon, literally once in the four seasons)