To be one-up'd. Often used to describe a verbal, nonchallant, "one-up"ing of someone when telling an impressive story and therefore stealing their thunder.
Guy talking to his friends: "I fought two guys at once yesterday and won!"
Another Guy: "Man, that's cool. Kinda like when I fought that grizzly bear with my bare hands. And won."
Guy talking to his friends: ....
A Third Guy: YOU JUST GOT DEWEESE'D!