A nap you take before going out to the bar, allowing you to stay out later and drink more.
I have to work at 7 AM tomorrow, but I took a bar nap so I should be able to hit last call.
by xccmx May 26, 2011
When you've drank too much at a bar and you are at the point right before blackout and you lay your head on the bar and sleep it off a little.
Luke took a bar nap and we needed an airhorn to wake his ass up!
by MamaDucket October 22, 2008