blabber (
http://definr.com/blabber)
n : one who reveals confidential information in return for money
[syn:
informer,
betrayer,
rat,
squealer]
v : speak (about unimportant matters) rapidly and incessantly
[syn:
chatter,
piffle,
palaver,
prate,
tittle-tattle,
twaddle,
clack,
maunder,
prattle,
blab,
gibber,
tattle,
gabble]