after one has taken a dump, sometimes they dont wipe their anus properly which may lead to leftover dried shit crusting around the ring of the anus.
man i tried to lick her ass, but she had a crusty anus, she needs to clean it better!
by Mya April 10, 2005
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when you jizz on a girls anus and let it go nice and crusty
delicious :)
i gave your mum a crusty anus
by iLOVErednecks April 07, 2020
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