My DSS is 13. I honestly think that each time I see him, he has invented a new word. The latest one is 'centy'... apparently meaning certified. Which when put into context for me, still didn't make sense. I gave up trying to understand in the end. (NB it did not mean 'officially recognised as possessing certain qualifications or meeting certain standards', being the definition provided by Google).
AIBU to want our children to use the words that already exist, not to create new ones which mean absolutely nothing to me?!
For what it's worth, I am not old! I just don't get it.