This phrase is not exactly slang, but a popular saying in Spanish. It translates to 'Charity against charity is not charity.' It means that if you do something good for someone expecting something in return, it's not real charity or kindness.
Examples
- Spanish: Juan siempre ayuda a los demás esperando recibir algo a cambio. Pero ya sabes, 'caridad contra caridad no es caridad.'
- English: Juan always helps others expecting something in return. But you know, 'charity against charity is not charity.'