The much faster walking pace that someone usually acquires after drinking coffee. Also associated with a faster rate of speech. A coffee walker is typically unaware of their condition until it is pointed out to them.
Slow down, I can't keep up with you when you're coffee walking.
I can tell by your coffee walk that you're ready for the big meeting.
Ease up on the coffee walk; we're not racing.
Why are you walking so fast? Coffee walk?