When victimized by food poisoning, one needs to put a vomit bucket in front of them while sitting on the toilet, not knowing from which end the next "issuance" (diarrhea or vomiting) will happen, or fear that the thrust from throwing up will cause diarrhea or vice versa.
"After some bad swordfish, I was sitting and playing sphincter roulette in the bathroom for most of the night."
by SJPUNOME, The Grand Pilubah February 25, 2015
a nipple who's movement that you can control so much that some people have been known tot tie shoe laces with them
that brother has the biggest sphincter nipple son, i saw him pouring sprite for everyone at the party last night
by dragonslayer1111 January 15, 2003
by J April 28, 2003
by djandym January 03, 2015
Something you say to someone quickly causing them to say "what?" and then you go "haha you said what so you're a sphincter!"
by One Eyed Milkman July 10, 2004
when you take a crap and it sprays and burns so bad from too much hot and spicy food and still burns after your done wiping
by jordiea January 21, 2011
The act of "sending the packet" to ones sphincter. Think of common networking terms when thinking of this definition.
by Jarod c October 08, 2005