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1. a specific kind of tease: an individual who extensively and repetitively leads on another individual in a romantic and/or sexual way, but fails to follow-through.

2. an individual who flakes out of romantic/sexual promises plans at the very last minute, often without sufficient reason or cause.

Can be abbreviated with the acronym BMUB.
She called me five times last week, but when I wanted to schedule a date for this week, she never picked up my calls or answered my texts- totally a build-me-up-buttercup.
by The CLAAAP January 07, 2011
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