Top Definition
The act of rubbing peppermint extract on the tip of your penis prior to anal sex so as to give the intense, burning, minty sensation in the girls anus. Also helpful if intending to go ass-to-mouth. atm
She was in the shower trying to rinse her ass out after Bryan gave her that peppermint foster.
by DocTel May 08, 2007
6 Words related to peppermint foster

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