barbecue stopper
n.— «Can crazy, aching love stem and sustain itself from one kiss?…This topic became something of a barbecue stopper among my sausage-turning friends this week. The meat of the discussion was: How do you know if you have enough to launch a full-blown romance?» —“A kiss may tell far more than you think” by Sarah Wilson Sunday Herald Sun (Melbourne, Australia) Jan. 11, 2004. (source: Double-Tongued Dictionary)