Popcorn found on the floor of a movie theatre after the movie has ended. Eating mopcorn is a way to save yourself some money by avoiding the $17 buckets that they sell at the concession stand.
Mortimer took his smokin' hot date out to see a midnight screening of Donnie Darko at the dollar theatre and saved money by eating mopcorn so that he had enough to smuggle in four bottles of wild irish rose.
Any kind of music that sounds like only common housewives would enjoy, as opposed to dadcore which refers to music that only the typical dad might enjoy.