to get an erection
Entre nous, franchement, les jolies filles te font bander, non ?
Between us, honestly, pretty girls turn you on, don't they?
— Memories of Murder (2003)
I started getting hard.
Tu auras du mal à bander un jour.
You’re going to have trouble getting hard one day.
— Le Frère 2 (2000)
Bander comme ça, c'est toujours bizarre.
Getting hard like that is always weird.
— Presque Célèbre (2000)
I can't get hard anymore.