- (Britain) Eye dialect spelling of half.
1894, Arthur Conan Doyle, Round the Red Lamp:
- 'Arf the night through he's at that game, the silly old juggins.
1914, Edgar Rice Burroughs, Tarzan of the Apes:
- Hasn't ye 'eard that devil's spawn of a capting an' is mates knockin' the bloomin' lights outen 'arf the crew?