Words have meaning, and that meaning is defined by common understanding. If a significant percentage of the population does not know what a word means, (and I mean a significant percentage not just some people) then it's fair to say the word is essentially nonsense.
The problem is sometimes people pick a word and then decide on its meaning but then neglect to inform the rest of the human population - see Woke. That's not how language works, it's about mutual acceptance the particular sound or set of sounds means a particular idea or concept or thing. If that mutual acceptance is not there, then it is not a word.