catch on
US /kætʃ ɑːn/
UK /kætʃ ɑːn/

1.
pegar, hacerse popular
to become popular or fashionable
:
•
The new dance craze is starting to catch on.
La nueva moda de baile está empezando a pegar.
•
I don't think that idea will ever catch on.
No creo que esa idea vaya a pegar nunca.
2.
entender, captar
to understand or realize something
:
•
It took him a while to catch on to the joke.
Le tomó un tiempo entender el chiste.
•
She quickly caught on to what I was trying to say.
Ella rápidamente captó lo que intentaba decir.