What is Screaming Batman?
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To wait until one's friend falls asleep(preferably on the floor, passed out drinking, etc.), squatting over friend's face with pants down, butt cheeks on outside of friends face cheeks, and passing anal gas as intensely as possible so as to cause a cheek to cheek slapping effect.
"First one to fall asleep gets a screaming batman!"
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Also the Tandem Olive Press
This is a sexual position where the man is seated on a toilet while the woman is sitting on his lap facing ..