A Water Style jutsu used by Naruto Uzumaki in the 241st episode of Naruto Shippuden. In order to do Rasen-pee, you must pee in any direction and then shout, "RASEN-PEE," while peeing.
Naruto: I really got to go... GOTTA BLAST!
*enters restroom*
Naruto: Go! RASEN-PEE!
1. words that result from extreme anger.
normally said under ones breath.
2. something you might yell at someone who is pissing you off, you just can't find the right words.
3. a substitute for cuss words.
Mom: "go to your room!!!"
child: (muttering up stairs) "rassen frassen.."