An insult, roughly equivalent to get lost or in some cases go fuck yourself. As far as I can tell, it is mainly used in Britain.
variation exists: Awa' an' bile yer heid! (Scottish)
The origins of this phrase are as follows, from http://www.phrases.org.uk:
"This relates to the fact that in South Pacific societies cooked food was 'noa' or the opposite of tapu (tapu is loosely translated as sacred though it has a deeper meaning than that). The head was considered the most sacred part of the body and one doesn't usually pat children on the head, or stroke a person's hair. An exhortation to turn your head into cooked food was regarded as the greatest possible insult."
Weird stuff.
variation exists: Awa' an' bile yer heid! (Scottish)
The origins of this phrase are as follows, from http://www.phrases.org.uk:
"This relates to the fact that in South Pacific societies cooked food was 'noa' or the opposite of tapu (tapu is loosely translated as sacred though it has a deeper meaning than that). The head was considered the most sacred part of the body and one doesn't usually pat children on the head, or stroke a person's hair. An exhortation to turn your head into cooked food was regarded as the greatest possible insult."
Weird stuff.
by NeNay July 16, 2008
 Get the go boil your headmug.
Get the go boil your headmug.