asslasticity

the scale at which a mans hind sphincter is rated for tightness.

I cant take another 6 months in jail without losing all my asslasticity.
The perfect fart requires a perfect balance of ass wind, butt gravey, and asslasticity.

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butt gravey

that brown juice that seeps from the anal sphincter. When combined with ass wind, it results in a shart. Sometimes it is a result of poor asslasticity and lethargic sphincter reaction time during a healthy fart.

Dang butt gravey keeps stainin my underwear.