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1.Dont know when to shut the fuck up.
2.Talks before thinking about what they are saying or why they are saying it without consideration for consequences.
3. Big mouth, loud mouth, Macho mouth.
4. Diarrhea of the mouth.
5. Talk the talk but too scared to walk the walk.
Someone who says they are great at playing pool until they get on the pool table and then can't make a ball in the hole; and have nothing but excuses afterward.
by April 20, 2005
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an obnoxious blowhard who pushes his/her ideas on others in an overbearing way, usually knowing nothing about the topic. Such person often thinks that other people are ignorant and stupid, and they often slam and belittle people who know the real facts. They think they are experts but they know zero.
1. AM radio used to have good music and radio plays and such. Since late 1992 it's been polluted with extreme political hateful loudmouths like Rubbish Limberger and other dummies. The morons have hijacked the AM dial.

2. You're a loudmouth baby

You better shut it up

I'm gonna beat you up

'Cause you're a loudmouth babe

by I Saw U2 Live Twice May 17, 2009
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1. A loud ass motherfucker.

2. Someone who will speak up about anything. especially anything that they don't believe in or believe strongly in.

3. Funny looking Golf Pants.
Harris was such a loudmouth at the abortion rally earlier.
by LOUD.MOUTH April 22, 2010
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