A derogatory term used among some Autistics and Aspies (people with Asperger Syndrome) to refer to a Neurotypical (derived from the abbreviation NT; NT-er; Nitter).
Dont worry about the people writing definitions on here about Asperger Syndrome being a fake disorder invented by people to justify being losers; they're nothing but a bunch of goddamn nitters
by Kurotowa August 17, 2008
Get the Nittermug. by Wollyishollx February 17, 2023
Get the Nittermug. by DHuis07 July 2, 2011
Get the Nittersmug. by Bobby Bayite January 21, 2005
Get the nittermug. by RhOaDy March 16, 2003
Get the shitter nittermug. 
