I thought she was acting foolishly, but I 'bit my tongue' [='held my tongue'] and didn't say anything.
The news of their engagement 'set tongues wagging'. = 'Tongues were wagging' over their engagement.
He speaks English fluently but his 'mother tongue' [='native language, first language'] is Chinese.
(..) We'll see. We'll see more or less? It's... - What the hell? - What? - No tongue. I promise. - You're retarded. Can't you go faster? I can't run in these conditions. - I'm at the maximum. - The maximum... it's way too slow. (..)2011 The Intouchables