Booze-lag
After drinking a few, you easily fall asleep only to wake up several hours later, wide awake and unable to return to sleep. The booze has upset your sleep cycle, similar to international or cross time-zone travel.
You: Dude, I had killer Booze-lag last night! I passed out after those margaritas at 9:30pm only to wake up with a vengeance at midnight. Too bad I have this presentation today and I'm wrecked...