Dictionary.net

(Apple; originally from the introduction to TomLehrer's song "It Makes A Fellow Proud To Be A Soldier") Usedironically to indicate the speaker's lack of the quantity inquestion; a mythical schedule slot for accomplishing tasksheld to be unlikely or impossible. Sometimes used to indicatethat the speaker is interested in accomplishing the task, butbelieves that the opportunity will not arise. "I'll implementthe automatic layout stuff in my copious free time."The phrase is also used for time reserved for bogus orotherwise idiotic tasks, such as implementation of badchrome, or the stroking of suits. "I'll get back to himon that feature in my copious free time."