Walking the walk and talking the talk?

Talk the talk means that you make verbal claims about your abilities. Walk the walk means that you can actually back up the claims with proof of your abilities.

For example if I say: I'm the best poker player in this room. I am talking the talk. And when I win the casino's poker tournament, I am walking the walk.

I have made a verbal boastful claim, and then I have backed up that claim with proof of my abilites by winning the tournament.

Lots of people talk the talk (most of the time this is know as trash-talking) but few people can actually walk the walk (back up those claims with proof of their skills).