Spackling

[PussyCat]

when you fart and poo comes out a bit only to be re-inserted by the [sphincter]

[Dave Paprocki]

The act of sucking/pulling up your butthole

[Hina Muqadas]

when ones pussy or anus is filled with come, and you queef or fart, spraying it out all over your partners body

[Cami]

V. to [spackle], to poo just a bit and let it rub ur undergarment (leaving a stain; skid mark) before letting it retreat back into the lower colon.
also
to bend over a sleeping partner and spread you but cheeks and let the poo poke out and rub (leaving a brown mark) on thier nose before leting it retreat into the lower colon.

[Magaret]

if u fart when u have a sweaty ass-crack your ring makes a spackling sound