Sometimes my wife travels with me to visit projects I work on. She gets to hear me BS with the security guards at some of the gated communities. One place has a very jovial guard who 'lives for the weekend' and every Wednesday expresses it as being Hump Day!
I explained (to my wife) street slang about humps and bumps and how working class Americans regard Wednesday as getting over the hump... thus hump day.
Now, when the guard says "You know what today is...?" My wife replies "Humpy Day"