When someone brings up a topic when talking but immediately drops it and refuses to switch back to the dropped topic.
Conversational Blue Balls is when:

"Goodness, did you hear about what happened?"

"What happened?"

"Anyways, I'm gonna go."

"Wait, what happened?"

"Oh, don't worry about it."
by T.R.S. December 6, 2007
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When a man engages a woman in an extremely suggestive conversation, that she ends abruptly just as he thinks he is about to “close the deal.” Could possibly result in injury to the man in extreme cases.
Tyrell: What’s wrong man, you don’t look too good?

Trayvon: Me and dis bitch was talkin freaky at the bar, and den all of a sudden she just stop talkin and roll out. Dis be da worst case of conversation blue balls I ever had. I think I be needin some ice.
by Trayvon July 17, 2009
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