Leftover Smile
Receiving a smile from someone only because they were previously laughing/smiling at something else. A very embarassing mistake.
I was so happy that he smiled at me, until i realized it was just a leftover smile
leftover smile
The awkward fading smile you have when you stop laughing at someone's joke.
Mike: *tells great joke*
Julia: *laughs, then stops, being left with an awkward leftover smile slowly fading*
Julia: *laughs, then stops, being left with an awkward leftover smile slowly fading*