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1.
A technical term used by the toilet paper industry to describe a person who neatly folds the toilet paper over itself before cleansing themselves. Opposite of a crumpler.
Man 1: How do you wipe your ass?
Man 2: Oh, I'm a folder.
by thecrumpler July 02, 2006
 
2.
A combination of getting fatter and older
It's amazing how much folder I feel today
by Deli Meatz December 25, 2010
 
3.
Container for organizing and storing files.

See: file.
I have all the files in a folder in my desk.

I copied all the files to a new folder.
by dipso January 07, 2004
 
4.
Someone who folds, using spare computer capacity.
A contibutor to Stanford University's Folding at Home project.
As you have such a powerful computer, and don't use it a lot, why not become a folder?

He's some folder: seven PCs folding and he wants to build three more!
by logicman_alf September 26, 2006
 
5.
Generally ( by gangsters and old rap artists ) refers to a criminal record. They use this to make people shut up.
Person : Hello, do you li---
Gangster : yo what you doin' gettin' all up in my shit, bitch I ain't got time fo' dis' shit, I gotta go get the needle fo' what I done. so get outta here and put it on my folder fool.
by castle21 February 23, 2014
 
6.
The act of putting multiple folders on your desktop to cover a naked wallpaper of a female. Usually the folders are arranged to form a bikini or other clothing items.
"Dude, at home I was totally foldering this hot chick."
by Falugalob August 14, 2009
 
7.
Vagina
Outhere Brothers, Boom Boom Boom:
"Grab your shoulder
bend you over
Slip my penis inside your folder"
by HB22 March 30, 2011