Top definition
used to describe either;
a) a male/female with an horrificly ugly face or
b) someone with an angry face similar to a gurn

derived from two seperate cockney rhyming phrases;
1)Grumble=Grumble and Grunt=Cunt
2)Boat=Boat Race=Face
so the translation is clearly cuntface...
'look at the GrumbleBoat on that...she was grim!'

'That dude was livid, he had a proper GrumbleBoat on him'
by grumble-love July 15, 2009
Get the merch
Get the GrumbleBoat neck gaiter and mug.
Aug 11 Word of the Day
You can tell by the way she walks, she got that WAP.

You can look at her face and tell she ain't got that WAP.
by Black Don August 06, 2020
Get the mug
Get a WAP mug for your barber Georges.