The word "Jerquing" does not appear to be a recognized term in the English language. It is possible that it may be a misspelling or a slang term. However, based on the phonetic transcription, it can be interpreted as /dʒɛrkɪŋ/ or "jerking." This word commonly refers to a sudden, abrupt movement or gesture. It is important to use correct spelling in written communication to effectively convey meaning and avoid confusion.
The search of a ship by a custom-house officer, called a jerquer, to ascertain if there be any concealed or unentered goods.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.