A derisive term for a hilarious joke that got posted to discussion boards or email lists too many times, by people that apparently post jokes themselves but never actually read anybody else's posts.
Originated from a large company's humor email list where approximately seven people posted, in a single day, Google Map's directions from NYC to Paris, which states that Step 23 is to swim across the Atlantic Ocean.
you: Dude, check out this link to a crazy dramatic chipmunk!
me: Yea, and be sure to check out step 23, it's hilarious.
me: And it's a hamster, nimrod.