A cool, sudo-foreign sounding name for an article of women's clothing used to support the boobies.
Kate: I need to find a boostenhalter!
Haley: ...a what?
Kate: A boostenhalter. You know, a bra. That's what my mom always called it.
Haley: Oh. My mom always called it an "over the shoulder boulder holder"
Jenny: BETTE MIDLER!!!!!