One who talks extravagantly, a loudmouth.
1940s; earliest use found in Lester V. Berrey (b. 1907), lexicographer.
verbslang, black english US
1To talk a great deal about something, with little or no action or result.
2To talk excessively to, especially in order to cajole or sweet-talk.
1970s; earliest use found in The Atlantic Monthly.