Top Definition
When an elderly person sitting in a wheel chair gives you a blow job.
Bill: "Hey Pedro isnt that your grandma over there?, What is she doing?"

Pedro: "Yes it is my grandma, i dont know what shes doing either"

Bert: "Haha, Pedro's grandma is giving that guy a Dusty Rhino"
by mike b 27 June 10, 2006
10 Words related to dusty rhino

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