motormouth

he's such a motormouth; he never stops talking.

at the party, she was the motormouth of the group.

i can't keep up with her; she's a real motormouth.

his motormouth tendencies often get him in trouble.

being a motormouth can be entertaining at times.

she didn't mean to be a motormouth; she just got excited.

his motormouth nature makes him a great storyteller.

sometimes, a motormouth can dominate the conversation.

i'm trying to listen, but his motormouth is distracting me.

her motormouth habits make her popular among friends.