To stay in, usually wearing the same clothes for a long period of time, bieng anti-social, lacking personal hygiene

Also can be used to describe the state of a room/house which is filthy/neglected
'What are you up to?' 'I'm festering today'

eeeerrrrrr You look festery

We are having a fat fester sesh!

'You festering man'

'fancy a fester?'

'STOP FESTERING'
by noface123 June 17, 2009
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A retarded ugly ass guy. Origin from Uncle Fester from Festers Quest on the nes.
Fester is locked in the girls bathroom again.
by JBee May 6, 2004
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a series of events taken by men every few months (from the day they turn 18 and up) with their mans, usually involving driving around town for hours, the purchase of tobacco, harassment of gas-station employees, eating corndogs, and the half-serious search for pornographic magazines
I should really call Luke, Pat, and Austin. We haven't festered in a long while, and I'm craving a cigar and a corndog.
by Toph23 July 13, 2009
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who cares that your brother stole your girl? you lettin it fester. get over it, she was a ho.
by nappyafrochik April 6, 2003
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Mainly designated as a person that stands up friends that are going to the Beer Festival. mainly they seem to be located in Knoxville, but can usually be found anywhere Beer is a bargain.
Dude...you beerfested me again! Whatever, that fester will never come down and wax your car. Did you get fested?
by Billy Joe Jim March 10, 2008
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A fester is someone who can be found at a festival of any type, regardless of the nature of said festival. You can identify a fester by the frisbees or nerf footballs they are commonly seen with in the parking lot of the fest.

An interesting fact about festers is that they procreate by biting non festers and injecting them with unholy fester venom. WATCH OUT!
Example:

Non Fester: Hey dude, what bands are you here to see?

Fester: Bands? Naw dude, I'm just here for the <i>fest</i>!
by Keil May 4, 2005
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