Definition of fogger:
(n) :
A device that releases an insecticidal mist.
(n) :
A device that generates artificial fog or smoke for stage performances.
(n) :
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.
(n) :
A person employed to feed cattle.
(n) :
(obsolete) One who fogs; a pettifogger.