Definition of "fogger"

fogger¹

noun
plural foggers
1. The outlet at the end of a hose which is designed to atomize, spray, or mist the contents flowing through the hose. Typical use includes gaseous materials such as nitrous oxide in automotive applications, as well as fuels for turbine engines.
2. A device that generates artificial fog or smoke for stage performances.
3. (obsolete) One who fogs; a pettifogger.
  Quotations
  A beggarly fogger.
  1614, Terence in English
  But then I had the [massive] flintlock by me for protection. ¶ […] The linen-press and a chest on the top of it formed, however, a very good gun-carriage; and, thus mounted, aim could be taken out of the window […], and a 'bead' could be drawn upon Molly, the dairymaid, kissing the fogger behind the hedge, little dreaming that the deadly tube was levelled at them.
  1879, R[ichard] J[efferies], chapter 1, in The Amateur Poacher, London: Smith, Elder, & Co., […]

fogger²

noun
plural foggers
1. A person employed to feed cattle.
  Quotations
  Describing a fogger's (cattle feeder) work on a winter day, he concludes that […]
  1953, William James Hyde, The English Peasantry in Contemporary Novels, 1815-1900, page 226