#phrasal_verb

🔹Catch on (no object):

To learn or understand something, sometimes after an initial struggle to do so.

🌀"Bill had never used a computer until he took this class, but he caught on very quickly and is now one of the best students."

🌀It was a long time before the police caught on to what he was really doing.

🌀We played a practice game so that the new players could catch on before we started betting.

🌀Thanks for explaining that concept to me—I think I'm catching on now.


🔹Catch on (with someone)

 to become popular and fashionable

🌀The idea of glasses being a fashion item has been slow to catch on.

🌀 I hope our new product catches on with children. I'm sure it will catch on.

#proverb

A fool and his money are soon parted:

Foolish people make purchases without consideration; it is easy to sell something to someone foolish.

🌀As soon as Greg won the big lottery jackpot, he turned around and spent it all at the casino. A fool and his money are soon parted.

🌀Go ahead and buy a diamond collar for your dog if you really want to.
A fool and his money are soon parted. 

🌀Bill sends a check to every organization that asks him for money. A fool and his money are soon parted.