In the United States, when a substance (drug) has a legal status of highly-illegal. It is also listed as having no medicinal value.

Marijuana is schedule 1 along with meth and heroin. There is huge controversy over the scheduled status of weed.

when you and a person are trying to get together but your schedules keep coming up with more and more conflict and you're like 'ah jeez i dont actually care about this person this much. fuck it'

When your partner only lets you shag on special occasions like Anniversaries, Birthdays, and Christmas. Therefore making it the ABC schedule.

A girl being unavailable for traditional sexual activities due to menstruation.

(Usually due to failed classes) When you go to pick up your schedule and find out your classes have been switched without your consent! OH FUCK NO, you've been schedule raped!

The act of scheduling tasks to be done at the last possible moment, thus allowing for a reasonable explanation as to why the person procrastinated in the first place.

the process in which a person battling a messed up sleeping pattern decides to skip 1 day of sleep in order to fall asleep by 8 p.m. and be awake by 4 a.m. Thus starting a new healthier sleeping pattern, like grannies.