moo
Concise Oxford English Dictionary © 2008 Oxford University Press:
moo/muː/
▶verb (moos, mooing, mooed) make the characteristic deep resonant vocal sound of cattle. ▶noun (pl. moos)
- 1 a mooing sound.
- 2 Brit. informal an irritating or disliked woman.
– origin C16: imitative.
'moo' also found in these Oxford entries:

