es cosa de

it's a matter of

→ ser
phrase Common #10,651
it's a matter of The exact sense depends on what follows: it can refer to something taking a certain amount of time, being characteristic of someone, or being suitable for a particular group.
SP: No te preocupes, es cosa de un momento.
EN: Don't worry, it'll only take a moment.

Es cosa de dos.

It takes two.

Esto es cosa de locos.

This is crazy.

— The Chaser (2008)

Eso de sobrino es cosa de maricas viejas.

That "nephew" business is for old fags.

— Cidade dos Homens (2007)

Atrás, esto es cosa de mujeres.

Back off, this is a woman's thing.

— Malena (2000)

No, eso es cosa de la forense.

No, that’s the forensic examiner’s job.

— Los renglones torcidos de Dios (2022)

Sólo es cosa de un minuto.

It's just a matter of a minute.

Entonces, es cosa de mi sexto sentido.

So, it’s just my sixth sense.

— Pedro Páramo (2024)

Eso es cosa de ella.

That's up to her.

— Una historia china de fantasmas (1987)

Es cosa de perros.

It's a dog thing.

Es cosa de familia.

It's a family thing.

Esto es cosa de pandillas, ¿no?

This is gang-related, isn't it?

— Un día de furia (1993)

Lo que les pasa es cosa de ellos.

What happens to them is their business.

— Jugada Maestra (2026)

¡Esto es cosa de hombres!

This is a man's business!

— El secreto de sus ojos (2009)

Para Gorodetsky, es cosa de vida o muerte.

For Gorodetsky, it’s a matter of life and death.

— Guardianes Del Día (2006)

Es cosa de un minuto.

It's a matter of a minute.

— Los olvidados (1950)

Hay que enviarlo a la retaguardia, la guerra no es cosa de niños.

He needs to be sent to the rear; war is not child's play.

— La infancia de Iván (1962)

¡Eso es cosa de traidores!

That’s something traitors would do!

— Cidade dos Homens (2007)

Es cosa de hombres.

It's a man's thing.

Esto es cosa de sirvientes.

This is a servant thing.

Esto no es cosa de niños, niña.

This is not child's play, girl.

— Aún estoy aquí (2024)

Es cosa de adultos.

It's an adult thing.

— Tu nombre (2016)

Esto es cosa de hombres.

This is a man's thing.

Jugar es cosa de niños.

Playing is for children.

Es cosa de un segundo.

It's a matter of a second.

Es cosa de las hormonas.

It’s a hormonal thing.

— Juno: Crecer, correr y tropezar (2007)