“It's pretty catchy.”
You heard a new song a few days ago, and since then you've been thinking about it a lot. You say this as you are talking with a friend about the song.
It's pretty catchy.
Want Video and Sound? Follow us on YouTube
You use "pretty" before an adjective to show how much of that quality something has.
"Pretty ___" is somewhere between "kind of " and "really". It basically means "a little more than you expected". For example:
This soup is actually pretty good.
I think I have a pretty good shot at getting the job.
That song is pretty catchy.
A "catchy" song is one that's easy to remember. It's also hard to forget.