The unspoken time at which everyone goes out to the bar. This time varies by season, city, age group, and type of bar.
"When are you going out tonight?"... "I don't know, around bar o'clock"
"Alright guys, enough pre-gaming, it's bar o'clock"
"Alright guys, enough pre-gaming, it's bar o'clock"
by KevInBmore February 10, 2009