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1.
An aspect or trait of one's personality that one is disowning, saying the trait belongs to a Tyler Durden, an alter ego, who therefore takes the blame. Derived from the Brad Pitt character in the movie "Fight Club."
No, I've never done heroin, but I HAVE THIS FRIEND, Tyler Durden, who shoots up in my bathroom all the time.
by dr adam June 23, 2005
 
2.
The god of all gods. If you watch Fight Club then you will know what I'm saying. There is nothing this person can't do. Guys want to be him, girls want to fuck him.
In Tyler Durden, We trust.

The first rule of fight club is:

You don't talk about fight club

The second fule of fight club is:

You don't talk about fight club
by Tyler Durden 3 May 06, 2006
 
3.
A relationship with a girl or guy who likes to play rough. Based off the line from the movie Fight Club - "I want you to hit me as hard as you can."
"Got these bruises last night, wow... Got a real Tyler Durden going with that quiet chick from work."
by Phantis Omega June 22, 2009
 
4.
verb - to sneak an alcoholic beverage out of a bar, usually by hiding it in ones clothing or pocket.
"We're ready to go to the next bar." "But I have a full beer!"

"Tyler Durden that shit!"
by dypsokat January 14, 2010