Use 'talk the talk' in casual situations, but avoid it in formal writing or speeches.

Colloquial Warning

The phrase often suggests someone lacks the ability their words imply.

Overconfidence Nuance

It can be used skeptically, to doubt if someone will deliver on their promises.

Shows a deep understanding of a topic, especially in professional settings.

Use the phrase when acknowledging someone's expertise among equals.

It can indicate credibility and command over a subject.