sinon
You better come back, or else I'm gonna kick your ass.
Tu ferais mieux de revenir, sinon je vais te botter le cul.
— Do the Right Thing (1989)
Or else, how would he know me from among the crowd?
Sinon, comment pourrait-il me reconnaître parmi la foule ?
— PK (2014)
We gotta get up higher or else we'll hit the tower, Captain!
Il faut qu’on monte plus haut, sinon on va percuter la tour, Capitaine !
— Kiki's Delivery Service (1989)
Better make it quick or else we'll be all day listening to his crap.
Dépêche-toi, sinon on va passer la journée à écouter ses conneries.
— Léon: The Professional (1994)