It's like when someone imitates someone else or does somethingcool after someone else already made it cool, basically saying someone is "riding the coat tails" of the person before them.
the heaps of smelly shit left by cattle the son of the famous stock car driver richard petty aka kyle petty
can also be slander
Wayne and Dell were chucking a cowpatty at each other when they heard that cowpatty had hit the wall in turn three!
Brian you can be a cowpatty sometimes.