A "Denim Dental Dam" is when the genital area isn't clean enough - or doesn't smell clean enough - to perform oral sex on the other party without a barrier to protect ones mouth. It is therefore necessary to have the denim jeans remain on the party to which it will be performed.
It smelled so nasty I had to leave on her denim dental dam so I wouldn't gag
ayon kay Sergeant Pretty ika-29 ng Disyembre, 2010
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