"Rollocks" is a variant spelling of the word "bollocks", which is a British slang term meaning nonsense or rubbish. The pronunciation of "rollocks" is the same as "bollocks", using the IPA phonetic transcription /ˈbɒləks/. The spelling of "rollocks" is believed to be a regional variation that has evolved over time. However, it's worth noting that "bollocks" is considered a strong swear word in some contexts, so it's best to be cautious when using either spelling.
For row-locks-see row.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.