WordNet (r) 3.0 (2006):
show-stopper n 1: an act so striking or impressive that the show must be delayed until the audience quiets down [syn: show- stopper, showstopper, stopper] 2: something that is strikingly attractive or has great popular appeal; "she has a show-stopper of a smile"; "the brilliant orange flowers against the green foliage were a showstopper" [syn: show-stopper, showstopper]