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Sit up

To sit with a fixed, upright posture.
Please sit up during class—stop slouching at your desk like that
by Hakanson February 14, 2021
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Sit up front

A bathroom prank similar to the Upper Decker, Dry Docker, and Riding the Horse Backwards, but logistically much easier. The idea here is to sit at the very front of the toilet seat, with your rectal opening just over the edge. This way, when you defecate, your feces falls just inside the front lip of the toilet bowl, leaving a brown streak on the side of the bowl. The fecal matter then "welds" to the side of the bowl, outside the water line, leaving a horrible stench and a difficult cleanup job. Because the toilet has not been altered in any way, people may assume that someone just "missed" and was not a deliberate act.

The problem with the "Upper Decker" is that most public toilets do not have an upper tank, and in private residences access to the upper tank is often difficult because of shelving, cabinetry, wall artwork, etc. If there is nothing near the toilet to hold onto, it is also difficult to balance. The problem with the dry docker is access to the shut off valve. In public restrooms this is usually not accessible. Riding the Horse Backwards makes no sense because one would have to remove his/her pants completely in order to straddle the toilet while facing the wall. Sitting up front accomplishes the same goal, but is much easier.
The employee at the sandwich shop was rude to me, so I am going to use their restroom and sit up front.
by Trumplodyte February 13, 2019
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Steve Bannon Sit Up

Sucking your own dick to the point where you yourself end up looking like a shrivelled prune that's been left out too long.
Why is Jack looking so sickly? Is he feeling okay?

Yeah, he's just done the Steve Bannon Sit Up too much.
by CrazyMoroccan August 12, 2017
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Magic Sit Up

The Magic Sit Up is a prank that you and a few buddies play on an unsuspecting victim. First, you have your buddy get down on the ground and close his eyes. Tell him, "When I'm finished with my chant, try and do a sit up." Then, make up some weird chant. Your buddy then pretends like he can't do a sit up. The victim is dumbfounded saying, "I have to try this." He gets down on the ground, closes his eyes, and you start your chant. In the meantime, your buddy drops his drawers and stands above the victim. When the chant is done, the victim will try and do a sit up, successfully, but he'll also get a nose full of your buddy's browneye.
Lee and I gave Corey a Magic Sit Up and he got a face full of Lee's ass.
by scomeau April 24, 2006
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atomic sit up

blindfolded, someone tries to do a sit up while holding the hands of someone else so they cant. little do they kno someone is bending over with thier ass out so when the person doing the situp lets go, they get a face full of browneye.
"Oh man, we gave jake teh BEST atomic sit up last night!"
by Matt Rup July 11, 2006
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Super Sit Up

A prank played by sports teams on new teamates where the new teamate is laying on the ground, and a towel is placed over top of their face. Then, secretly one member of their team pulls down their pants and crouches over top of the new teamate. The new teamate is then told to do 1 sit up. As soon as the victim starts to sit up, the towel is taken away from their face, and their face is shoved into the players ass.
Lance made the Chinese student do a super sit up.
by Jubulupu February 19, 2009
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impossible sit-up

the impossible sit-up(often called the olympic sit-up) is completed by asking an individual to lie on the ground in standard, bent-knee sit-up position while one accomplice blind folds or holds a towel or similar item over the eyes and holds the individual's head to the ground. the second accomplice gets into a squatting position with ass bare. the victim is signalled to attempt to sit-up against the pressure applied by the towel to the head. the towel holder simply releases the towel which allows the victim to sit up with nose directly into accomplice two's ass crack. a fart may be added as a bonus. the name "impossible" is intended to entice an overconfident victim into attempting this athletic feat. occasionally, idiotic victims might not even require the blind fold and will simply close their eyes. technique may be modified depending on intelligence level or sobriety of victim.
"Damn Bruce, your abs are ripped! I bet you could be the first guy I've ever heard of that can do an impossible sit-up."
by monkey12 June 25, 2005
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