1. To nap for so long that one ends up feeling more tired than before he or she took the nap.
2. To nap for a longer period than one expected to.
1. Dang, I overdozed again. Now I'm freakin' exhausted. What a huge waste of time.
2. Person A: I overdozed yesterday.
Person B: You don't say.
Person A: Yeah, I missed that afternoon class.
Person B: Sucks.
Person A: See you later. I'm gonna take a short nap now.
Person B: Better not overdoze. We've got stuff to do later.
Person A: I'll try not to.