Macaulay Caulking 

masturbating in the bathroom while your roommates are out and are unsure of when they'll return; IE, maturbating while home alone.
Pun on the word "caulking" (pronounced "call-king"), the rubbery silicone sealant around tubs and sinks.

roommate: What the hell were you doing in the bathroom when I got home? You were in there for a while.
deviant: Oh just Macaulay Caulking the bathtub tiles... you didn't leave a note so I didn't know when you'd be home.
roomate: gross

Macaulay Caulking by Donkeyfly August 26, 2013

macaulay caulking 

the effect on your insides,when you drink them raisin dry with lots of cheap whiskey (preferably The Great Macaulay Premium Scotch Whiskey 40 % Vol.)

A: Do you still have that horrible stomachache?!
B: It will be over soon, because tonight's gonna be macaulay caulking

macaulay caulking by ChrisRiot December 18, 2012

Macaulay Culking 

To be home alone, doing whatever, whenever, with whoever

person 1 - "hey man, what are you doing tonight?"
person 2 - "parents are out, i'm macaulay culking it"

Macaulay Culking by offensieve November 19, 2012