mynd ar ôl ysgyfarnog

Literally, “to go after a hare”.

mynd ar ôl ysgyfarnog (first-person singular present af ar ôl ysgyfarnog)

1. (idiomatic) to fly off at a tangent, to digress

• codi ysgyfarnog (“to deflect”, literally “to raise a hare”)
• chwilio am nyth cwhwrw (“to go on a wild goose chase”, literally “to search for a nyth cwhwrw”)

• Griffiths, Bruce; Glyn Jones, Dafydd (1995), “digress”, in Geiriadur yr Academi: The Welsh Academy English–Welsh Dictionary‎^[1], Cardiff: University of Wales Press, →ISBN