When a mans dick is resting on a woman's vagina and the vaginal lips overlay the penis' shaft.
Don't go through my photos because you'll see some major beef rainbow pics, man.
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(n.) When a female, standing on the ground, urinates upwards in an arc onto an elevated bed or other high place. A specialized form of the Golden Shower, this feat is more difficult for women than peeing standing up, even into a urinal.
"Can she use a urinal? Man, yesterday I seen her hit the ceiling with a roast beef rainbow!"
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