Top definition
verb. To laugh at the jokes of a movie you have already seen before they happen, esp. if the people around you have not seen the movie.
1. I can't watch movies with my mom because she keeps prelaughing at everything.

2. We were watching Uncle Buck and I didn't laugh as hard at the principle's office scene because someone was prelaughing before Buck even sat down.
by woodenrocketdave November 02, 2009
Get the mug
Get a prelaugh mug for your father-in-law Georges.