Under-Time is the shortage of hours given to an employee to do the same scope of work but in less time.
In the down economy, hourly workers are "expected" to "work smarter" and do added work and still get their regular work done as if they were "professionals" who owe the employer more-than-hourly performance.
It is often associated with a new RUSH assignment - or managers who get a BONUS for reduced labor costs.
Q) Are you working overnight with us to re-arrange the cereal shelves and move old stock to the front..we're even getting Over-Time..?
A) No, I've been given Under-Time for hanging up all the new signs to promote the changed pricing..and wasn't even given enough hours to get the regular store signs installed..
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.