A girl who is giving a blow-job and she's using her teeth or bites down.
Not doin that again shes a clam mouth.
by Psycho-Bitch-4969 November 22, 2014
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Being in a very bad situation
Hey did you study for the test? No, did you? No, oh man were in the clams mouth now!
by Twiisted February 8, 2019
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