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Referencing back to what a celebrity would do when wanting to achieve a goal sexually
"I was hooking up with this guy last night, and all I could think about was what my sinspiration would do in my place"

"Megan Fox is my #1. sinspiration!"
by TwatShot October 22, 2009
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Inspiration coming from a sinful, vulgar, or just downright bad idea. Sinspiration is often a negative thing, but in rare cases can turn out to be beneficial.
Netflix and a box of pizza gave her the sinspiration to stay inside and become antisocial.
by mgtheunicorn August 22, 2017
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