aggravator

From aggravate +‎ -or.

aggravator (plural aggravators)

1. One who or that which aggravates.
2. (UK, slang, obsolete) Synonym of Newgate knocker (“a lock of hair worn twisted back toward the ear”).
   • 1848, William Evans Burton, Waggeries and Vagaries, page 57:

     An aggravator, or love curl, of a delicate roundness, hung low upon the imperial forehead, […]

• John Camden Hotten (1873) The Slang Dictionary

aggravātor

1. second/third-person singular future passive imperative of aggravō

• "aggravator", in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)