I am Jack's 

All of the "I am Jack's" lines from the film Fight Club

Articles that the unnamed narrator discovers:

I Am Jack's Medulla Oblongata
I Am Jill's Nipple
I Am Jack's Colon

Variations that the unnamed narrator creates:

I Am Jack's Raging Bile Duct
I Am Jack's Cold Sweat
I Am Jack's Complete Lack of Surprise
I Am Jack's Inflamed Sense of Rejection
I Am Jack's Smirking Revenge
I Am Jack's Broken Heart

I am Jack's by Jack Colon May 8, 2008

I am Jack's 

These are the original "I am Jack's" from Fight Club

I am Jack's Raging Bile Duct.
I am Jack's Cold Sweat.
I Am Jack's Complete Lack of Surprise
I Am Jack's Smirking Revenge.
I Am Jack's Broken Heart

I am Jack's by Elliot C. April 13, 2006

I am Jack's 

Origin - Fight Club (1999)
Used to emphasise a statement with added pop culture.
For female use, "I am Jill's..."
User can substitute "Jack" with their own name.

I am Jack's complete lack of surprise.
I am Jill's disturbed nightmares.
I am Bob's overwhelming rage.

I am Jack's by JediAndi September 12, 2005

I am Jack's  

A substitutive for the phrase: I feel/am X used in reference to oneself in the 3rd person.

Ex. I am feeling sad.

into

I am Jack's deflated happiness.

This is quite obviously made in reference to fight club in which the character refers to himself in the third person because of his schizophrenia

I am Jack's by antwskinner August 5, 2008