overtalk

Etymology
From.

Verb

 * 1)  To talk too much.
 * 2)  To overcome or persuade by talking; talk over.
 * 3)  To overstate; overexaggerate; talk up to seem greater than what is actual.

Noun

 * 1) Excessive talking.
 * 2) Simultaneous speech or talk which drowns out all other speakers.