Irritated sphincter caused by over-active bowels due to consuming large amounts of draft beer Friday and Saturday. Usually stems from not abusing alcohol during the week, then compensating for the hiatus by binging through the weekend. Sometimes involves a hemorrhoid or two.
#1. My friend could not go mountain biking with us last week because of his Sunday Ass.
#2. Why does that bar have to have Miller Lite specials over the weekend? I end up with Sunday Ass every time I try to save a little coin.
#2. Why does that bar have to have Miller Lite specials over the weekend? I end up with Sunday Ass every time I try to save a little coin.
by Benji Barker March 7, 2007
The prime day for a simp to come out and make the maneuver. Typically seen busting out of church trying to bust open a box with the local chick from mcdonalds.
I saw some guy kissing the feet of a tik tok egirl the other day at the park. Man i hate Simp Ass Sunday
by BustOpenDaBox July 21, 2019
A day in which your able to slap anyones ass guy or girl twice a day every sunday if you slap the persons ass more than twice they get to bend you over and slap your ass 10 times with a weapon etc.. belt, paddle, stick, whip
Joey slapped my ass 3 times so i get to bend his ass over and spank his ass with a belt 10 times since its slap ass sunday
by ScuffedDickInABox November 20, 2017
Basically, a joke that originates from a shitty video in which sans and nagito komaeda dance with the hallway that has sans in it in the background, with the song "fingers in his ass" playing in the background, which was discovered on a Sunday, afterwards creating Fingers in his ass Sunday.
by Jeef The Dumbass May 16, 2022