(v.) The act of being boring while talking about chlorophyll. (extremely hard) (from the urban dictionary)
Originated in the film Billy Madison starring Adam Sandler
When the science teacher talks about Chlorophyll and Billy Madison replies Borophyll
Billy Madison is a 1995 comedy film starring Adam Sandler in the title role about a slacker who must go back to school in order to take over his father's company. The comedy also features Bradley Whitford, Josh Mostel, Bridgette Wilson, Chris Farley, Norm Macdonald, Steve Buscemi and Darren McGavin. It was written by Sandler and Tim Herlihy, directed by Tamra Davis, and produced by Universal Pictures.