overtalk

To talk too much.

To overcome or persuade by talking; talk over.

To overstate; overexaggerate; talk up to seem greater than what is actual.

[…] and he panted like a young faan in her fust race with the hounds, for he was overtalkin' his strength, and I feered he would die for sartin ef he didn't fetch up a bit and git rested; […]

Excessive talking.

Simultaneous speech or talk which drowns out all other speakers.