dársela

A colloquial reflexive construction, most often heard in Spain as part of the fuller idiom dársela con queso (literally "to give it to someone with cheese"), meaning to trick, deceive, or pull one over on someone. On its own, dársela a alguien carries the same sense of fooling or making fun of someone.

• No intentes dármela, sé lo que pasó realmente. — Don't try to trick me, I know what really happened.
• Nos la dieron con queso y no nos dimos cuenta. — They pulled one over on us and we didn't even notice.
• Siempre trata de dársela a los nuevos empleados. — He always tries to trick the new employees.

This idiom only makes sense with the full construction (dársela a alguien, often with con queso) — dropping the object pronoun la or trying to translate it word for word into English will produce nonsense.