Green’s Dictionary of Slang

nonsense; something fraudulent.

1898		Binstead & Wells Pink ’Un and Pelican 226: Even if the latter do sometimes get a draft on the well-known banking house of Johnnie Rollox & Co., of St James’ Street, for their winnings.
1930		(con. 1918) J. Hanley German Prisoner 25: ‘If you try that on again I’ll cut the rollocks out of you’.
1975		J. Franklyn Dict. of Rhy. Sl. (1981) 154: Johnnie Rollocks Alternative form of TOMMY ROLLOCKS.