a person who is "down with fifteen" is a person who likes to get with fifteen dicks at the same time. for instance, if a person jacks you or pins you out in some way, then they're "down with fifteen"

v. collectively or individually finding someone/something to blame for a problem, as opposed to brainstorming which connotes finding solutions to a problem

n. the act of finding someone/something to blame for a problem

(from a TV ad for HD television)