We found one dictionary that defines the word rattle one's hocks:

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1. rattle one's hocks: Wiktionary

Definitions from Wiktionary (rattle one's hocks) ▸ verb:  (slang) To hurry up; to get moving. ▸ Words similar to rattle one's hocks ▸ Usage examples for rattle one's hocks ▸ Idioms related to rattle one's hocks ▸ Wikipedia articles (New!) ▸ Words that often appear near rattle one's hocks ▸ Rhymes of rattle one's hocks ▸ Invented words related to rattle one's hocks