The time a teenager or young adult wakes up to correlate the time he wishes to eat a sandwich.
This usually involves and empty schedule, so the perpetrator is often waking up for sandwich time after 11 AM and as late as 2 PM.
Luke: What time you getting up tomorrow?
Reggie: Probably sandwich o'clock.
Luke: When is that?
Reggie: The time I wake up and immediately make and eat a sandwich. I got nothing to do tomorrow.