Some disagree with the popularity of this phrase, these people are known technically as 'slappers'. Most people feel a deep level of sympathy for these hideously ugly 'slappers', for they emit such a level of stupidity that even a slug is more intelligent and infinitely more beautiful.
Dancing teacher "Dancers always smile Timmy, come on you know that. Everyone does!"
Slapper "Dancers always smile isnt a common phrase!"
Everyone else in the world "Yes it is you disgusting filth-bag"