Spanish phrase
No es mi trabajo.
Meaning
That's not my job.
When to use it
States that a task is not the speaker's duty. Used to decline requests and may sound curt; speakers often soften it by suggesting who should take the task or offering help.
Example dialogue
¿Puedes preparar la presentación para mañana?
Can you prepare the presentation for tomorrow?
No es mi trabajo, habla con María que lleva ese proyecto.
That's not my job. Talk to María; she's in charge of that project.