In real life he's a prince of an Islamic sultanate steeped in centuries-old traditions, but on Instagram Brunei's Abdul Mateen is more Hollywood than royalty as he flies in fighter jets, drives speed boats and poses bare-chested after workouts.
From millennial pout to the peace sign, there have been several poses that have hung around for decades. However, now the "nose cover" pose has left a lot of adults scratching their heads over what it might mean.