When your banging your partner and then soon you start shoving your penis into her anus, and you try to shove it until it touches her sphincter, and then after minutes of shoving, you cum a painful stream into her anus. Named after the aerial stunt from MLP: FiM.
Last night, dude, I started giving your mother the sonic rainboom and she was like, "OWWW!!! STOP IT!!!!".
by A Really Bucking Fastard January 17, 2013
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1. rubber foot coverings, similar to a rain boot
2. rainbootz have special designs and extra support and tread for superior stomping capabilities while puddle jumping.
1. rubber foot coverings, similar to a rain boot
2. rainbootz have special designs and extra support and tread for superior stomping capabilities while puddle jumping.
by alh0913 March 26, 2011
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Official fandom name of kpop girl group bugAboo. The name rainboo was chosen by fans through an online poll, and was revealed and made official on November 1, 2021.
by jieeeun July 30, 2022
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