tú pídeselo

ask him/her for it, ask it of him/her

→ pedir
píde 2sg imperative + se Reflexive marker + lo Third-person singular direct object
verb · 2nd-person singular informal Rare #47,422
ask him/her for it, ask it of him/her Informal singular command; se refers to the person you ask, and lo refers to the thing you ask for.
SP: Si necesitas el libro, pídeselo a Ana.
EN: If you need the book, ask Ana for it.
Conjugation of pedir
Imperative
SingularPlural
First — pidamos
Second pide —
Third pida pidan

Por lo menos pídeselo una vez.

At least ask them for it once.

— Rang de Basanti (2006)

Pídeselo a las otras hermanas.

Ask the other sisters.

— La Linterna Roja (1991)

Cuando le pidas al juez un nuevo abogado, pídeselo bien.

When you ask the judge for a new lawyer, ask properly.

— Cuestión De Honor (1992)

Pídeselo a tu padre.

Ask your father.

— Los 400 golpes (1959)

Pídeselo a él.

Ask him for it.

— Un profeta (2009)