Top Definition
Someone who swears a lot.
Can also refer to semen in the mouth of a girl (or boy).
Also a skateboard magazine based in New Zealand.
Alex was wanking in the bath and the jizz landed in his mouth. Bloody muckmouth.
#muckmouth #muck #mouth #wank #skate #alex
by Nobjockey101 September 13, 2008
5 Words related to Muckmouth
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