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1.
a napkin that is placed in the ass throughout the course of a a day in order to decrease the chances of itching.

*Thanks to a caller on Howard Stern
Good thing I've had that ass napkin in all day, I almost streamlined!

Hey Brutus, gimme one of your ass napkins cuz I have a killer itch!
by Brutus Roengardener November 03, 2007
 
2.
Toilet paper; also used as an insult.
You fucking ass napkin!
by {42}Ix June 08, 2003
 
3.
Noun: (1) Toilet Paper, originally. (2) Now usually used to describe a person who is shallow or gullible, and who swears excessively.
That assnapkin got himself banned for swearing and cyboring newbies!
by Zk4r January 06, 2005
 
4.
another name for toilet paper
im stuck on the bowl, theres no more ass napkins!
by calimoe May 25, 2006
 
5.
A term usually used to describe a manager of a lending institution who looks like a white monkey, smiles with a grill that looks like it's been pounded in by a bag of melted nickles, and is dumber than a brain dead retard. Can be used interchangeably with the term "ass clown"
My manager Greg is such an ass napkin
by Assnap15 January 09, 2014