A penis that is so errect that it turns purple and throbs.
I stuck my purple throbber in your mom's ass lastnight and she screamed like a sheep in a slaughter house.
by Mooncricket June 18, 2003
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A raging hard-on...ready to explode
She rode me until she climbed off my purple headed throbber and it spayed all over her face
by Mr.JJM August 25, 2006
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