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A popular joke amongst the Timbers Army supporters group for the Portland Timbers MLS team.

Initially meant as a rule to keep a single supporter from taking up entire rows while they wait for their friends to show up late, now it's initial meaning is long since lost and is merely a funny joke inscribed on the wristbands handed out to fans who show up early.
Bro #1: "Hey bro, how many scarves should I bring to hold down seats in the front row for next game?"

Bro #2: "One seat one scarf, bro."

Both Bros: <laugh while packing an IKEA bag full of scarves>
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by PTFCLinePolice June 16, 2018
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