Top Definition
When you set your alarm clock for a certain time and then suddenly wake up and jump up thinking you overslept. You then look at your alarm clock and notice you didn't oversleep, you actually woke up way earlier than you had planned.
I set my alarm clock for 8:00 AM because I was supposed to pick up Kelli at 9:00 AM. I jumped up thinking I overslept and looked at my alarm clock. It was only 5:23 AM. I underslept.
by Superood April 19, 2011
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