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The act of pressing a semi erect penis against someone while wearing tight jeans.

Named after the legendary rock god Robert Plant who was the front man for the band Led Zeppelin. He was know for wearing tight jeans on stage when his penis could frequently be seen bulging down the left pant leg when he would become sexual aroused while making love to the music during another amazing performance.
My friend Robert Planted me when I was kneeling down picking something up. I felt his semi erect bulging cock press right against my fat bald head. (Robert Planting)
by Roberto Planto September 28, 2014
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