A dusty armadillo is performed by having doggy style sex (vaginal or anal) and, at the crescendo of the performance, dump some talcum powder on the girl's head and call out, "Dusty Armadillo," and punch her in the back of the head.
"Man, I was plowing away on that girl and gave her a dusty armadillo. I couldn't see for like ten minutes, that shit went everywhere"
by Big Al 250R May 19, 2006
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