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The act of discarding the first square of toilet paper while in a bathroom. This removes the outside chance that the last patron touched that piece while removing toilet paper for his own use. This becomes especially important when using a public restroom. Also can be referred to as s-squared.
"Hey man, you better practice safety-squaring when you're done in there."

"Of course I s-squared, what do you think I am?"
by UWbadgers16 February 18, 2009
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