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When an argumentation goes to shits and both parties opinions are split in two halves, the "butt rule truce" is an option to defuse the situation. Whoever claims it first gets to spank the other on the bum to lighten the atmosphere.

In a written context, it's shortened as brt, which also can lead to hilarious follow-up.
Wow, we can't seem to agree on if sloths are slow or not in any way, I call butt rule truce. *smack*
by Testostus January 24, 2017
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