Casual Undertime 

Getting paid for forty hours for the week when one has worked less than forty hours for the week. It is best when casual undertime is achieved by legitimate means, such as leaving early for the 4th of July Holiday with your bosses permission.

I work casual undertime during the work week before a three day weekend: I usually can leave four hours early on Friday and still be paid for them.

Casual Undertime by William Juntunen February 8, 2007