Any person who is given to large bouts of hyperbole and/or exaggeration. Claims regarding facets of his or her life will sometimes seem plausible until combined with the multitude of other experiences and/or possessions he or she claims to have had.
Jill: "Apparently he claims to be a good friend of Matt Shadows of Avenged Sevenfold."
Jack: "Even though he's 13 years Shadows' senior and has absolutely nothing in common with him?"
Jill: "Yup."
Jack: "What a total bragavond."
For when you have done something so shameful but can't stop telling people about it that it almost seems like you're bragging.
"Ok this may be a bit of a shame brag but last night I got so drunk I lost my wallet, phone, ipod, friends, self-respect and woke up in a bin with no shoes on."
OR
"I felt so creepy when I made out with that teenager last night."
"No need to shame brag about that to everyone."
An annoying Facebook status update in which an insecure person consistantly boasts or brags about ones life, husband, children, animals, turd size, ect. in order to impress others and convince themselves of their fantasy life because they suck in the real world.
EXAMPLE: "Look at Buffy's status, she's a bragbooking fool! Didn't her momma teach her anything?"
BUFFY: My life is PERFECT, I have the BEST husband in the world and the smartest kids who do no wrong! I love you Mack!!!
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!
Using the injury/death/loss of somebody you barely know in order to gain attention and/or sympathy from your social circle. Generally through social media.
"did you see Lauren's Instagram post about Phil?"
"Yeah, what a grief brag that was"