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An exceptionally warm vagina.
"Darling, I'm quite cold. May I please stick my frigid penis in your peter heater?"
by Christopher Blake Mitchell January 30, 2007
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A term used by surfers to describe when they urinate in their wetsuits to relieve themselves and keep warm.
It was getting pretty cold out in the line-up, so i pulled a peter-heater and warmed right up.
by Michael Joshua May 17, 2005
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A garment (often knitted) worn over male genitalia to keep it warm. Sometimes used in cold climates, but also sometimes used by male dancers as a costume piece. Also known as a "willy warmer".
Bart was getting a chilly wily, riding his bike in the winter, so he pulled on his peter heater and it was all good.
by Mr. Park-Ranger January 01, 2007
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