Green’s Dictionary of Slang

ballocks v.

also bollox

to go, usu. with prep., e.g. ballocks off; often as imper. meaning go away!

[US] E.M. Berry ‘Sawmill Divertissements’ in Botkin Folk-Say 219: I bolloxed up there one night.
[UK]M.F. Caulfield Black City 11: ‘Got a match, Sammy?’ asked the man. [...] ‘Go climb a wall,’ said Flynn. [...] ‘Give us a light.’ ‘Go and bollix,’ said Flynn.