Complaining about yourself/your life or a complimenting someone else/theirs, as a thin veil for bragging.
X: I am totally jealous of ugly girls, it is really annoying having to decide which guy to let buy you a drink at the bar.
X: Your staycation must have been awesome! Going straight from the beach in south of France to skiing in the Swiss Alps took so much out of me.
You: X, stop backwards bragging!!!