Binge eating and drinking on a Saturday as a form of revelry. Rewarding oneself on a Saturday with food, drink, and entertainment without a care for diet.
"Of course I'll have dessert, it's Saturday Phatter Day!"
"My belly has been yearning for Saturday Phatter Day."
"My belly has been yearning for Saturday Phatter Day."
by Johnny B Mindful October 13, 2013