naked o'clock
When the clock hits a certain time and all your friends decide to be totally naked because they think it’s the most fun ever.
At my cousin’s birthday, the whole room was naked by 2 AM and just screaming into the night.
My boyfriend texted me at 1 AM: 'We’re at naked o’clock. I’m wearing nothing but my pride.'
At the bar, the DJ said, 'It’s naked o’clock, folks!' and everyone took off their clothes.