This is a popular saying in Spanish that translates to 'Tell me who you hang out with and I'll tell you who you are.' It means that the people you choose to spend time with often reflect your own character.
Examples
- Spanish: Carlos siempre anda con personas groseras y arrogantes, así que no me sorprende que él también sea así. Dime con quien andas y te diré quién eres.
- English: Carlos always hangs out with rude and arrogant people, so it's no surprise he's like that too. Tell me who you hang out with and I'll tell you who you are.