The number 67 is out at In-N-Out.

The popular fast food burger chain has removed 67 from its ordering system because of the viral “6-7″ trend, apparently growing weary of kids yelling out “six-seven” and going through the hand motions when the order number was called.

People magazine reports it has confirmed the number has been removed from the ordering system. However, Parade reports it’s unclear if the ban includes all locations.

The number 69 previously had been banned from the ticketing system.

Anyone who has spent time around elementary or middle-school-aged children likely has heard them say “6-7″ and then respond with an up-down motion with their hands, suggesting either-or.

It’s unclear what the trend means or how it got started. It might have its origins in an unreleased s

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