What is the euphemism for loudmouth?

There are many euphemisms for "loudmouth," depending on the context and desired level of politeness. Here are some options:

Neutral:

* Talkative

* Outspoken

* Vocal

* Effusive

* Expressive

Negative but polite:

* Boisterous

* Loquacious

* Garrulous

* Rambling

* Overly enthusiastic

* Somewhat loud

More negative:

* Blabbermouth

* Chatterbox

* Motormouth

* Windbag

Informal:

* Big mouth

* Loud and proud

* Mouthy

The best euphemism to use will depend on the specific situation and your relationship with the person you are talking about.