Parents and teachers may be baffled, but among young people the "six-seven" trend has been everywhere for months, if not years.
On Monday, 6 July, at 6.07pm, Luxembourgish influencers called on as many people as possible to gather on Place Guillaume II in an attempt to create the biggest six-seven in the world. Whether they succeeded is another question.
But what does six-seven actually mean?
"In principle, it means nothing", explained influencer Argentdifficile. "I also told my school management that it's something positive, or rather, not something negative, but not really something positive either. It just means nothing. It's simply a funny meme, with neither a negative nor a positive connotation."
For influencer Marie, however, the trend has a more collective meaning: "Six-seven means that young people come together and unite through a movement."
The social media trend is said to have started in 2024 with rapper Skriller's song Dude Dude. The track led to memes involving basketball player LaMelo Ball, who is six foot seven inches tall, roughly two metres.
The trend became a global phenomenon once children and teenagers adopted it and began posting their own versions on TikTok.
On Monday evening, several influencers attempted to set a world record on Place Guillaume II for the largest six-seven gathering. The initiative was launched by influencer Max Feller.
"Six-seven still affects so many people emotionally in a positive way, but it also triggers a lot of people negatively", Feller said. He added that the trend still provoked strong reactions, both positive and negative, and joked that Luxembourg was overdue for another record.
"It can't be that our only gold medal was once in ninepin bowling", Feller said. "Now we're also going to win a medal in six-seven."
A world record was unfortunately not on the cards, but the event did manage to mobilise around 50 people.
Perhaps they will simply have to try another six or seven times.
