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1.
When you begin to shit in a toilet, and the water splashes up and touches your butthole.
I jizzed when I took a shit and got a Poseidon's kiss.
by Dickbutt March 10, 2012
 
2.
When water splashes up from the toilet onto your butt from your poop dropping into the water.
Upon defecating, Alex felt the cool wrath of Poseidon's Kiss as it grazed his buttocks.
by billypilgrim3000 May 08, 2012