A sexual position wherein one person has sex with another person doggy style while periodically dunking their head in the water. Typically the water source is a toilet, and the person performing the P-Town Plunge uses their hand. Variations could include using a foot to do the dunking, or using a bucket or bathtub or other receptacle for the dunking...
Hank took that hooker into the bathroom in Vegas and did the P-Town Plunge on her.
by Micah2g December 14, 2007

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