Tube Challenge 

The World Record for visiting all London Underground stations in the shortest time.

Carlos participated in the Tube Challenge.
Osama just beat the Tube Challenge again.

Tube Challenge by mullardo December 8, 2009

Colgate challenge 

The act of pooping out a flaccid penis.

He fell asleep on top of me when he was done, I gave him the Colgate challenge and snuck out.

Colgate challenge by jefeefefefe February 17, 2010

Excrementally Challenged 

Constipated.

Man, I shouldn't have chugged all that Pepto Bismol, I'm gonna be totally excrementally challenged for the next few days.

Excrementally Challenged by smellanor_ September 15, 2010

follicularly challenged

a baldy individual

The victim was able to identify the perp because she remembered he was follicularly challenged.

follicularly challenged by zsazsa109 October 7, 2010

follicularly challenged

verb phrase: the politically correct term for someone with a deficiency of hair follicles and/or sexual equity.

he's so follicularly challenged that he couldn't get laid if <insert easy sex scenario here>

he's so follicularly challenged that his head shines bright enough to focus solar energy for power.

follicularly challenged by brentus maximus October 11, 2010

Ophetically Challenged 

To be challenged by awesomeness

The fans blocked the door to the celebrity's house; he was ophetically challenged

Ophetically Challenged by Zez Appleknocker December 7, 2010

hetero-challenged 

Any person who is definitively not straight or heterosexual, but is not sure where he/she falls on the continuum between gay (homosexual) and straight (heterosexual).

She's not gay, but she's not quite straight, and she's not quite bi--she's just hetero-challenged.

hetero-challenged by Nemo_GN909 April 21, 2011