to give extremely dedicated oral sex to a male. referring to the mouth on the freshwater fish.
"oh man, that girl was into me last night, you should have seen her givin the bassmouth!"
by jchronic April 9, 2007
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When a women speads her legs and you see her lungs. 😅😅😅
" I fucked this chick who had a bassmouth vagina"
by Holt3113 May 9, 2016
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