The Yarmouth countdown
The act of anal sex in which the partner on the receiving end takes a large amount of laxatives. The goal is then to for the one penetrating to finish before the laxatives take effect.
-Hey John, how did your date with Sarah go?
-Horrible, she wanted me to do the Yarmouth countdown
-Gross
-Horrible, she wanted me to do the Yarmouth countdown
-Gross