If someone describes something as a crock of shit, they mean it has no value, is of very poor quality or is completely wrong. Frankly, I think the whole poem is a crock of shit. All that stuff about us splitting up, it's such a crock of shit. Note: A crock is a clay jug or storage jar.

COMMON If you talk about a pot of gold or a crock of gold, you mean a large amount of money that someone hopes to get in the future, or something that will bring them a large amount of money in the future. The business is now worth at least £100 billion a year — a pot of gold that attracts the most diverse people. The government and employers rejected the notion that there was a crock of gold in unpaid taxes. Note: You can also talk about a pot of gold at the end of the rainbow or a crock of gold at the end of the rainbow, with a similar meaning, though this suggests that you will never get the money. Ethan was sure there was a crock of gold waiting at the end of the rainbow if only he could get himself an agent.