Definition from Wiktionary, the free dictionary
- whatever/no matter what someone does/says, etc. (followed by an infinitive expressing the verb "do", "say", etc.)
- on a beau faire ― whatever you do; no matter what one does
- on a beau protester ― however much you protest
- il a eu beau essayer ― try as he might
- On a beau dire, il n'est pas bête. ― Say what you like, he's not stupid.