4 definitions by E. Ho
a mythical fairy that visits males during sleep and sprinkles them with semen. the jizz fairy is used to explain nocturnal emissions (also known as "wet dreams").
by E. Ho February 19, 2009
by E. Ho March 29, 2008
a mythical beast that steals your undies in the middle of the night whilst you are sleeping, most often after consuming copious amounts of alcohol.
The undie monster paid me a visit last night.
by E. Ho September 27, 2009
by E. Ho October 20, 2008