je vais lui faire

I'm going to do/make [something] for/to him/her

→ je
phrase Rare #29,372
I'm going to do/make [something] for/to him/her A common construction meaning that the speaker is about to do or make something for or to someone. Lui can mean “him” or “her”; the specific action usually follows, such as faire une surprise, faire plaisir, or faire une bise.
FR: Je vais lui faire un cadeau pour son anniversaire.
EN: I'm going to give him/her a gift for their birthday.

Je vais lui faire une offre qu'il ne pourra pas refuser.

I’m going to make him an offer he can’t refuse.

Je vais lui faire porter ma valise à l'étage.

I’m going to have him carry my suitcase upstairs.

Je vais lui faire une proposition sérieuse.

I'm going to make him a serious proposal.

Je vais lui faire prendre, pour l'amour de Dieu.

For God's sake, I'll make him take it.

— Don Juan DeMarco (1994)

Je vais lui faire fermer son clapet.

I'll make him shut his mouth.

Je vais lui faire une bise.

I'm going to give them a kiss on the cheek.

— Perfetti sconosciuti (2016)

Je me suis dit, je vais lui faire plaisir!

I thought to myself, I'm going to make him happy!

— Jean de Florette (1986)

Attends de voir ce que je vais lui faire.

Just wait till you see what I'm going to do to him.

— मुन्ना भाई एम बी बी एस (2003)

Ta soeur, je vais lui faire crédit aussi?

Your sister—am I supposed to give her credit too?

— La Haine (1995)

Je vais lui faire la surprise.

I'm going to surprise him.