Definitions by E. Michael Wood

Narc out

To fall asleep quickly, with no verbal warning, usually when previously with a group of people. Origin is from the disease narcolepsy.

Where is that guy? Did he just go narc out somewhere?

Acronym for the phrase "No big deal". Typically used sarcastically at the end of a statement of importance as to say it was in fact a big deal.

I got an 89 on my econ final. That's 10 points above average! NBD.