I vote games like scrabble don’t use made up words just because they can give you big points. In that case why not just allow your players to place down all their letters in any random order and call it legal? It scores more points, so why not, Big Scrabble?
Also, I’m also personally against the use of made up slang words that started appearing around the 2010s and are now in common use, or at least were in common use.