Verb. or Noun. To appear to complain while actually boasting. Usually used as a conversation-starter in a small group. It allows the user to bring up something about themself, such as wealth, status, etc under the guise of ellicting pitying. The first known use was "It's so hard to find good help these days." More modern usages would be, "I can never find Seven jeans in size 00 at the local mall, so I have to drive all the way out to the city."or "I am just so angry at my husband; he went and bought a new Mercedes for me without asking what color I wanted!"
If I hear one more bitch-to-brag about how the quality of Prada shoes has slipped recently, I'll puke.
The only time my boss mentions his son is when he's bitchin'-to-brag about the tuition he pays to send him to Harvard.