To clean the crevice of someone's posterior with floss, spatula, tumbleweed, or any other implements suitable for the task.
Flassing is recommended for people who have a great deal of things stuffed in or up their cracks that they become stiff and obnoxious.
Warning: Consult your physician if you experience rashes, blisters, or any other physical discomfort from doing said activity.
Prices shown in USD.
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