(Verb)- The act of crushing the pelvic bone of an elderly person while having rough sex; due to osteoporosis.
Russ: Hey, can I give your Grandma a dinosaur crunch?
Jon: No way man, she's already in the hospital for the one you gave her last week!
Jon: No way man, she's already in the hospital for the one you gave her last week!
by Alligator face April 05, 2011
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