This is not a slang term, but a common phrase in Spanish which translates to 'In unity, there is strength'. It means that goals can be achieved more easily as a group rather than individually.
Examples
- Spanish: Si queremos ganar este partido, debemos trabajar juntos. Recuerda, en la unión está la fuerza.
- English: If we want to win this match, we must work together. Remember, in unity, there is strength.