In CB slanguage:

1. n. One who talks continually.

2. v. To talk continually.

3. v. To talk on the CB radio.
If you ratchet jaw, then you are a ratchet jaw.
by Downstrike May 30, 2004
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When you blow a guys cock for so long, that you're jaw starts hurting really bad.
... I sucked him for so long, I got ratchet jaw.
by Emsily June 3, 2005
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When you eat a chicks pussy for so long that your jaw gets locked and feels like turning a ratchet
Man, it too that chick so long to cum last night i got ratchet jaw
by lonestar June 1, 2004
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When you do a lot of Coke or Crank & your jaw involuntarily moves in and out or back and forth.
I did a line of glass last night and I still have ratchet jaw, I'm going to be sore as fuck tomorrow.
by Cum Slinger September 23, 2015
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