It can also be used on the internet, and is especially found in Facebook quizzes. They will casually add in a question so they can show off their answer. Usually people adabragging have low self esteem, and nobody cares.
Fiona: Urgh, I've smelt enough flowers to last me a lifetime!
Lisa: Huh, why?
Fiona: They always put fresh ones in the room.
Fiona: Yeah, at The Ritz. I stayed there in London
Lisa: Woah, adabrag much?
Last thing you ate: Salad, and champagne:)
Where do you buy your clothes: Oh, just Armani, Dolce & Gabbana, Versace, Dior, Chanel, whatever x
What did you do last weekend: Just been out with (insert popular/famous persons name here) and on their private yacht:) lmao
George's Comment: Adabragging spotted. Be ashamed.