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To "Slang that Eppley" is to go hard or put in work. It's similar to going ham. "Slangin' that Eppley" is something you do. It's a lifestyle.
1. When someone dunks on someone they are "Slangin' that Eppley."

2. When something good happens one friend says, "What you slang?" Other friend, "THAT EPPLEY!"

3. When my teacher asked me how I did so good on the exam I said, "I Slang That Eppley!"
by WhatYouSlang May 18, 2010