typically used for making fun of someonethinking they just delivered the roast of the century to you, but can be used unironically if you're a shitposter
person a "guys you should watch this video"
person b "nahim too busy watching ya mutha, oooooh rotated"
A vulgar order given as an equivalent of "shove it up your ass, shut up, go fuck yourself", it usually implies that someone is being arrogant. Literally meaning "go sit on a cock and spin", it's also worded as "Sit on it and spin, sit on it and rotate, and 'go sit and spin'.
Usually said while flipping off flip off someone. It's like saying "fuck you" and kicking it up a notch by telling them to sit on the finger you are providing and rotate on it to ream themselves good.
Sit on it and rotate it, she said as she flipped off the group of boys.