Noun
something that is strikingly attractive or has great popular appeal
an act so striking or impressive that the show must be delayed until the audience quiets down
Source: WordNetshow stopper
she has a show-stopper of a smile Source: Internet
the brilliant orange flowers against the green foliage were a showstopper Source: Internet
Kate Middleton, now offically the Duchess of Cambridge, was obviously the show stopper in her two Sarah Burton for McQueen wedding dresses, but everyone else dressed to the nines, too. Source: Internet
It has also stuns landlubbers, like spectators in the Inman Park wacky parade, where it was a show stopper. Source: Internet
Generally not a show stopper as you can work offline but it just slows you down when you just want to type something up in the road quickly. Source: Internet
Having the theme crop my images is a show stopper. Source: Internet