In a move to curb disruptions, some In-N-Out Burger outlets are reportedly phasing out the use of order numbers “6-7” due to their association with a viral trend, according to People magazine.

A Los Angeles In-N-Out employee revealed to People that this change was implemented roughly a month ago. Additionally, the chain has decided to exclude the number “69” from its order system.

The shift in policy first caught public attention on Reddit, where a user observed a peculiar pattern: “Every time I reached number 66, the following customer would receive number 68, bypassing 67 entirely.”

Reddit users were quick to connect this move to the infamous “6-7” trend.

One employee shared on Reddit that, while usually not problematic during daytime, the issue intensifies on weekend nights or after sorority meetings, when order number 67 triggers chaos among young customers.

“[I live] in a college and high school town, it was big for a while but has died down for sure now,” another said. “Our managers and associates always had a bit of fun with it and never worried about it.”

On Reddit, meanwhile, users claiming to be employees said their management teams had instructed cashiers to ring up a water cup whenever order No. 67 was next, thereby skipping the number and eliminating the need to announce it over the intercom.

The phenomenon was first reported by SFGate, which contacted In-N-Out’s corporate offices about the alleged issue, as well as locations in Southern California. None provided any confirmation of a change in policy.

The California-based chain declined to comment on the reports when contacted by Nexstar.

Sometimes written as “67” but pronounced “six seven,” the slang term is frequently said while alternating between lifting your hands, palms up, in a sort of juggling or weighing motion, like you’re weighing options.

The term, which went viral online, was named Dictionary.com’s word of the year, despite ongoing debate over whether it qualifies as a word at all.

Dictionary.com said its annual selection is a linguistic time capsule reflecting social trends and events. But the site admitted it, too, is a bit confused by “6-7.”

Nexstar’s Addy Bink contributed to this report.