Someone who is all hot and aggrevated or moody. Someone all in a huff. Usually aimed at spoilt children who cant get what they want or women on their period.
Woman: bla bla bla nag nag whinge whine your not going to the pub
Man: Stop being such a gruffle monkey and put my dinner on for 10pm.
Man: Lets have sex darling
Woman: I cant im on my period whinge whinge nag nag
Man: Stop being such a gruffle monkey and take it like a man.