French phrase
Seriez-vous partant pour ~ ?
Meaning
Would you be up for ___?
When to use it
A polite way to ask if someone is willing. It softens a suggestion and can sound slightly formal with close acquaintances.
Example dialogue
Seriez-vous partant pour aller faire une randonnée dimanche matin ?
Would you be up for going hiking on Sunday morning?
Oui, volontiers.
Yes, I'd love to.