A fake smile used as a cover to hide the pain inside. It is something that certain individuals tend to use often, as a constant "mask" of their unhappiness.
1. "Look for the girl with the broken smile. Ask her if she wants to stay awhile. And she will be loved." - She Will Be Loved by Maroon 5

2. "I feel bad for her... She always seems to be wearing a broken smile, ever since her husband died. It must be hard to pretend to be happy once something like that happens."
by The Lost Angel July 10, 2010
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Physical condition of-sorts where your smile is very hard to be defined; or may look like you are constipated at times when you are really having a laugh.
Vinny looks constipated over there with that Italiano broken smile of his.
by TrashCompactor69 December 21, 2016
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