Ferris's day off 

a day taken of with the excuse of being sick

tomorrow is my friend's birthday , I'm gonna take a Ferris's day off

Ferris's day off by that guy Ferris October 29, 2017

Ferris Bueller's Day Off 

Call in sick at work but spend the day doing fun things i.e. shopping, tennis, lunching, etc

Sale at J.Crew starts tomorrow - I think I'll take a ferris bueller's day off and get there when it opens.

Ferris Bueller's Day Off by pinkandred17 March 6, 2009