Green’s Dictionary of Slang

a scolding, a reprimand; thus rollock v., to reprimand.

1981		(con. c.1930) A. Harding in Samuel East End Und. 272: That’s how the judge went on. He rollocked them all.
1981		J. Sullivan ‘Christmas Crackers’ Only Fools and Horses [TV script] He actually took the money then gave me a rollocking!