Shark mouth is when a girl has a scary lookin mouth that reminds you of a shark.
shark mouth is often enhanced with braces and thin lips.
appears that if your dick was inserted, it could be bitten off.
dude #1: "dang man, that girl's got a bad case of the shark mouth"
dude #2: "yeah dude, it looks like your thang would be bit CLEAN OFF"
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