“Yeah, it's decent.”
You and your boyfriend are looking for a restaurant to eat dinner at. You pass by a restaurant that you've been to before. Your boyfriend hasn't been there, but you have. He asks if it's any good, and this is your answer.
Yeah, it's decent.
"Yeah" is a more casual way of saying "yes".
Say this to agree with something that a person said:
You can also say "yeah" when you're going to disagree but you want to make your disagreement sound a little softer.
"Yeah" sounds less formal than "yes."
When you say that something is "decent", it usually means that it's good enough. In other words, it's good but not great.
A "decent" restaurant might be good enough to eat at if you're hungry and want to get some food quickly, but probably not good enough to go out to for a special occasion.
Here are some other examples of sentences that use "decent":
I'm a decent drummer, but mostly I play bass guitar.
It was fun. A decent number of people showed up, which was nice.