An original joke/theorem from the YA author and nerdfighter extraordinaire and secret sister, Maureen Johnson. This was brought up in this video. It states that any book title can become funnier by affixing the phrase "in your pants" to the end. Some book titles are especially funny such as any of the Winnie the Pooh books.

Eg. A Spot of Bother, in your pants

This later lead to a forum at Brotherhood 2.0 and the Ning called "My Pants". This would often lead to funny comments such as "This discussion will be continued in My Pants" or "My Pants will be down for a while today."