Blab and Let slip

Blab verb - To engage in casual or rambling conversation.

Let slip is a synonym for blab in tell topic. In some cases you can use "Let slip" instead a verb "Blab", when it comes to topics like gossip, blurt out.

Blab is a synonym for let slip in confess topic. You can use "Blab" instead a verb phrase "Let slip", if it concerns topics such as reveal, utter suddenly.