interjection/bɛ̃ vwa.jɔ̃/
I'll bet! well, well! come on! yeah, right! what a coincidence! (used ironically to indicate disbelief of a statement); come on! good grief! sheesh! (used to agree with another speaker's incredulity or dismay)
“Je te jure, c'est par pur hasard que j'étais là. —Ben voyons !” — I swear, it's a complete coincidence that I was there. —I'll bet!
Synonyms: mais bien sûr, c'est cela