A person who is in their twenty's and think that they know about life, only to find out later how confused they really were.
1st Person: How old where you when you went bar hopping and clubbing?
2nd Person (in their 40's): Back when I was Twenty-Dumb I think.
2nd Person (in their 40's): Back when I was Twenty-Dumb I think.
by Jeff Sanders March 7, 2008
Get the Twenty-Dumbmug. 
A more emphatic synonym for "tom-foolery". The type of behavior that results in disruption, annoyance, loss, or destruction.
Hey shithead, if it hadn't been for all your dumb-fuckery we may have made it to the glory-hole on time to meet Ole' Blew.
by Doug Mesner June 16, 2004
Get the dumb-fuckerymug. A dumb fuck is someone that is undeniably stupid, they can't get their life together because of their epic level of stupidity, so they just continue to do dumb fucking shit, like dumping their millionaire girlfriend for an old Filipino prostitute that's married and has a kid.
(A) Have you ever met that guy Toby?
(B) No, I don't think I have...wait! Is he a dumb fuck?
(A) Yes! He's the guy I was telling you about, the one who got engaged to a married Filipino prostitute.
(B) Woah, he really is a dumb fuck.
(B) No, I don't think I have...wait! Is he a dumb fuck?
(A) Yes! He's the guy I was telling you about, the one who got engaged to a married Filipino prostitute.
(B) Woah, he really is a dumb fuck.
by Honestyyyyy December 8, 2014
Get the Dumb fuckmug. a stupid female/hoe who has no fuckin sense at all. they do stupid shit without even thinkin about it.
by baiile August 13, 2007
Get the Dumb Broadmug. A movie, but not just any movie, produced in 1996 by New Line Home Entertainment that is 113 minutes of pure enjoyment. The plot line is a magical duo and their cross country trip to return a breifcase to its rightful owner. This movie is full of cooky mishaps, moronic confusion, and just pure hillarious-ness. An unrated version has recently been re-released with never before seen footage. This is unarguably the greatest movie of all time and has had fans as slaves since the day of the release. Should certainly be reguarded with the highest of standards, for it set the bar for every comedy movie to follow. Simply Brilliant.
by Excusemeflo x August 30, 2006
Get the dumb and dumbermug. Probably you considering that you searched this
by Can’t spell rape without pear March 9, 2019
Get the Dumb fuckmug.