definition of
show-stopper

[1] #1 show-stopper n. [showstopper, stopper] an act so striking or impressive that the show must be delayed until the audience quiets down. wn

[2] #2 show-stopper n. [showstopper] 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". wn