backdoor brag 

When one subtly inserts a brag while simultaneously being humble. As seen on 30 Rock, mentioned by Jenna Maroney to Kenneth

Jenna: "Here's an example of a backdoor brag: It's hard for me to watch American Idol since I have perfect pitch."

backdoor brag by conor103 August 12, 2011

backdoor bragging 

Backdoor bragging is when you sneak something wonderful about yourself in everyday conversation.

30 Rock Episode Dialogue:

Kenneth: The personal essay is way harder than I thought, cause it's not in my nature to brag on myself.
Jenna: Not even a back door brag?
Kenneth: What's a back door brag?
Jenna: Backdoor bragging is sneaking something wonderful about yourself in everyday conversation. Like when I tell people it's hard for me to watch American Idol cause I have perfect pitch. You try it.
Kenneth: Oh, it's hard for me to watch American Idol because there's a water bug on my channel changer.
This comes back later in a talk with Liz:
Jenna: People always underestimate my instincts because of my good looks.
Liz: This is no time for back door bragging!

backdoor bragging by David Ward May 30, 2008

Back Door Braggart 

n. A person who states a problem that they have with the express intention of letting everyone know how awesome they think they are, revealing their douche baggery to all.

v. Back Door Bragging: The act of expressing a false statement in order to set up the conversation to prove how (seemingly) fantastic the subject finds themselves.

effect: typically leads to eye rolls and general annoyance with subject.

Sarah: Lets go check out the new mall!

Lisa: Oh I hate clothes shopping anymore. Since I've been working out I can never find anything that fits because my waist is too tiny and my tits are too big. Life is so unfair!

Sarah: You're such a back door braggart, Lisa. Go fuck yourself.

Back Door Braggart by Jescati August 14, 2010