The expression 'talk the talk, walk the walk' is used to express that someone's actions, words and behaviours should be aligned with what they say. If someone is accused of being able to 'talk the talk but not walk the walk', it means they are good at saying the right things but not behaving in the way they themselves suggest. This expression is similar in meaning to 'lead by example', or 'put your money where your mouth is'.

1. You were very impressive in your interview so you can clearly talk the talk, but now that you've got the job we'll soon find out whether you can also walk the walk.
2. Lucy is the real deal. She can talk the talk and walk the walk. In fact, no one in the office can talk up a big game and then deliver like she can.
3. In the world of finance, talking the talk is easy, but walking the walk; delivering on your promises under huge pressure, that takes skill and determination.

1. She talks about going to the gym and eating healthily but every time I see her she is drinking or eating junk food. She talks the talk but she can't walk the walk.
2. My father always says I should be more organised and gives out to me when I get things wrong, but he is exactly the same. Don't talk the talk if you can't walk the walk.