Blabbing often happens without the intention of causing harm but results in giving away information. I didn't mean to ruin the surprise; I just blabbed without thinking.
Pro Tip 2/3
Colloquial Usage
Use 'blab' in casual conversations rather than formal or written communication. I can't believe I blabbed about the new project in our casual lunch.
Pro Tip 3/3
Negatively Charged
'Blab' often carries a negative connotation, implying loose talk or indiscretion. She tends to blab when she's nervous, revealing more than she should.