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A slang word often used for penis, but also can mean when two people together get a flute and stick it in their genitalia or what have you for musical entertainment.
Susy is so hot. Last night, I gave her the ol' Love Whistle.
by Kelsey Hopper June 17, 2008
See Penis, schlong, or rod of love.
Look at the love whistle on that guy.
by Eat me August 28, 2003