When your friend, typically named Daniel, dont wants to actually make the assignment, but you dont want to, so you get out of the classroom attracting attention from everyone. While going out the door you say something along the lines of, its showtime mother fuskers.
When you are a 16 year old who is dating someone who is in the year below therefore making them 15. This is typical 'noncy behaviour' however they make it work and are adorable so no one questions it