Expression: Tu ne manques pas d'air

Meaning: You've got some nerve/cheek

Literal translation: You don't lack air

Notes: The French expression manquer d'air means "to lack air," as in On manque d'air - il faut ouvrir la fenêtre (It's stuffy / There's no air in here - we need to open a window).

Informally, ne pas manquer d'air is synonymous with avoir du culot and ne pas manquer du culot - to have nerve/cheek.

Example:
   Tu oses revenir après ce que tu as fait ? Tu ne manques pas d'air !
   You dare come back after what you did? You've got some nerve!