schoolnight 

Left over from when you'd stay up too late when you had school the next day, but applied to adult life; For example going clubbing when you have work the next day

Andy: Ah man I had a massive hangover this morning, was nearly late for work!
James: Clubbing on a schoolnight? Tut tut!

schoolnight by Calamity James August 21, 2009

school night 

To have commitments the next day, esp. in the morning, eg interviews, work, dates etc, that prevents you from doing something (usually fun and stupid) on that night.

Originated, (obviously) when having to go to bed early because school was the next day.

I'd love to get drunk and stay out all night with you guys, but it's a school night!

school night by ph@11u55y June 26, 2009

School Night 

An excuse to prevent from doing an immediate action or otherwise on a later date.

See, I would punch you in the face for steeling my tater tots, but you know what .... its a school night

School Night by Larbac August 17, 2010

School Night Vibes 

When everybody in the group chat is sending dumb shit avoiding their responsibilities for the next day. Founded by EB, typically applies to Snapchat group chats later than 10 pm

“This some School Night Vibes right here”, Sameh says after Rajan finished talking about how he would fuck Evan, “For the boys” while procrastinating his Physics Lab

School Night Vibes by formerjuicyback September 22, 2019