(colloquial, humorous) What's up?

Alternative form of what's up Doc

To cause the air to become filled with dust from a surface. / To make a fuss about something trivial or noncontroversial.

plural of muck-up day

(Australia, informal) The final day of the senior school year, when departing pupils sometimes play pranks.

To outdo.

(idiomatic) to start something

(informal) To do a large amount of cooking at once; to prepare a great deal of cooked food. / To cause a storm (weather phenomenon). / To create a stormy situation; agitate or enrage.

plural of turn-up for the books

plural of turn up for the book