The reaction of your asshole to having cold toilet water splashed on it by a large piece of fecal matter hitting the water.
by Psypiral April 23, 2003
The natural reaction of your sphincter to contact suddenly and violently when you are embarrassed by something or —especially— FOR someone else.
"Did you see that TV show with the juggler who was performing for the Queen? Wow, I sure did have a sphincter-blink when he dropped all those balls!"
by wordbird June 29, 2006
through breathing and a yoga-like technique, an individual battles to remain in control of the muscles in their anal sphincter and prevent the effects of diarrea. Often practiced as a result of drinking non-bottled water, while travelling in a foreign country.
in constrained circumstances such as travelling on public transport where the only toilet is extremely unsanitary, and in fact, someone has dumped on the floor rather than in the toilet, and, desperate to go to the toilet due to the effects of diarrea or more generally prairie dogging, one would practice sphincter yoga to avoid having to go to the toilet at that time
by Danielle Goodsell September 06, 2006
by Jim J January 27, 2006
a man who acts or is a flaming homosexual
by Ryan May 07, 2004
by Tay~Lyn and WhiteNoise July 14, 2011
A condition in which the anus has basically been turned inside out or dropped from its normal position. Often a result of repeated straining while trying to defecate or trauma from sodomy.
That child molester in cell block 19 had a prolapsed sphincter after the other inmates got a hold of him in the shower.
by Wiseman July 25, 2006