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Using a pocket knife to chop off the top of your sock so you can wipe your butt when there's no toilet paper. You keep the bottom part as a sock. This is a common move in Latin America where toilet paper is like gold.
I had to wipe with my sock top because the toilet paper was stolen by the janitor.
My sock looked like a hot dog after I used it to wipe my ass in the office bathroom.
I cut off my sock top with a knife and called it a day.