What can I say?

"What can I say" is something you say when you don't have any other good response to what someone says. Some situations where you can give this answer include:

• When someone says something really good about you, and you agree but you don't want to brag.
• When someone is really angry about something, but you aren't able to fix their problem.
• When someone criticizes you, and you agree that it's true.

You can use it like this:

A: You're such a good singer!

B: Yeah, well, what can I say? It's a gift.

(something) runs in (someone's) family

When something "runs in" a family, it means that many people in the family share the same quality. The quality might be something physical:

Red hair runs in my family.

Or it could be a disease:

He told me that heart disease runs in his family.

Or it could be some personality trait:

Me and all my sisters have always been like this. Short tempers run in the family.