walk your talk

To back up one's boastful talk with meaningful actions. (A compressed version of the largely American, "If you're going to talk the talk, you have to walk the walk," or, "You talk the talk, but can you walk your walk?" and other such iterations.) This consultant has sold us on some pretty radical ideas, but it remains to be seen whether he can walk his talk.

walk your (or the) talk

suit your actions to your words. informal, chiefly North American

This expression is also found as walk the walk .