What coriander stem?

Explanation of the meaning of coriander stem;

Funny joke, cheating terrier. Coriander is green, and the dish is given to the other party, which means that the other party is green.

Source source:

From an online joke. A and B are having dinner together. A Q: If he knows that his best friend's girlfriend is cheating, how can he remind his best friend that he is cuckolded? B can only point to the parsley on the plate on the dining table, and then A gives B a handful of parsley.

Usage scenario:

Prompt the scene of derailment.

Example:

What's good for dinner today?

B: There's a plate of coriander.