A fun topic!

The word "nostr" in the hashtag #NOSTR is likely a play on words referencing the phrase "most better than", and then adding the suffix "-estr" to create a humorous superlative form, similar to "best".

So, #Morebetterest becomes a tongue-in-cheek term that pokes fun at the idea of creating an even more exceptional word by combining "more" and "betterest".

The hashtag #NOSTR is probably being used in the context of the provided link's article, which seems to be discussing breakdancing.