A competition amongst the male populace to see who can go the longest without sexual interaction or masturbating during the time of lent. That means no masturbating, handjobs, blowjobs, penetration, or any other form of sexual interactions that could possibly result in orgasms.
by rsnyper February 11, 2010

1st person: "That guy is such a fucktard!"
2nd person: "You shouldn't say that anymore. The politically correct term is fucktally challenged."
2nd person: "You shouldn't say that anymore. The politically correct term is fucktally challenged."
by Zinnc November 29, 2011

Game played on Wikipedia that involves starting on a random page and trying to get to the page on Adolf Hitler by clicking on links in the wiki page.
I was playing the Hitler challenge yesterday, who knew you could get from cheese to Hitler in four clicks
by Wild Ram March 30, 2013

Spend the entire day with someone (could be significant other, or just a friend, etc.) butt-ass naked.
(Man 1) "Yeah me and my girlfriend did the naked challenge yesterday... It was pretty cool"
(Man 2) "Dude that's awesome, I've always wanted to do that with my girl."
(Man 2) "Dude that's awesome, I've always wanted to do that with my girl."
by jimbob157 March 12, 2012

by mhurtado07 October 9, 2008

Drinking six natties, smoking six bowls, and doing six shots all in one sitting without throwing up or passing out.
Lanny: Yeah man, last week I tried to do the 666 challenge, but then I threw up all over my apartment. Now my landlord is super pissed I fucked up his carpet.
by yummyinmytummy69lolz June 29, 2011

a challenge where you have people stand completely still while one person films the whole room walking around. When this is posted on the internet, it is put with music. (preferably Black Beatles)
by lxciana November 21, 2016
