(Apple; originally from the introduction to Tom
Lehrer's song "It Makes A Fellow Proud To Be A Soldier") Used
ironically to indicate the speaker's lack of the quantity in
question; a mythical schedule slot for accomplishing tasks
held to be unlikely or impossible. Sometimes used to indicate
that the speaker is interested in accomplishing the task, but
believes that the opportunity will not arise. "I'll implement
the automatic layout stuff in my copious free time."
The phrase is also used for time reserved for bogus or
otherwise idiotic tasks, such as implementation of bad
chrome, or the stroking of suits. "I'll get back to him
on that feature in my copious free time."