How can you find out how old a cabbage is?
By looking at its cabbAGE.
Cabbage Age
Categories
Explanation
Explain Bear
Alright, listen up, buttercup. This joke is playing on words. See, "cabbage" ends with "age." So the joke implies that you can tell how old a cabbage is by looking at its "cabbage," which sounds like you are looking at its age. The joke is funny because you are thick.