Top Definition
any person entirely covered in herpes from head to toe. The herpes have deformed them so much that they resemble some sort of ancient dinosaur. Though a herpasaurous rex hasn't been spotted in over 5 billion years they are believed to still have an influence on how most people get herpes today.
Did you see that hooker?
She looked like a herpasaurous rex...
maybe she was... Can't wait to tap that.
by PB & J May 07, 2008
7 Words related to herpasaurous rex

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