when someone happens to fall in love with a girl who had been before perceived as a nerd. usually ends in the singing of a song.
Boy 1: That girl is such a nerd.
Boy 2: No she's not, she's really cool.
Boy 1: Oh, no.
Boy 2: What?
Boy 1: You must have Granger Danger
Boy 2: I think I feel a song coming on.
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