There is a line in Dongcheng Xi Wine: Banana, pull it. What does that mean?

Banana, you are guava. The allusion of this term should come from Sammo Hung's "Five-Star Red Flag" movies since 1983. One of the characters in the film is called Rhinoceros Skin (played by Feng Cuifan), who has a bad temper and loves to call names. Once he accepted the advice of a psychologist. Every time he wanted to swear, he changed the unpleasant words into fruits, so "Banana is your guava" appeared.

Later, this sentence often appeared in Hong Kong films, such as Andy Lau's "Best Bad Friends" series 1988, Dongcheng Xijiu 1993, and many Stephen Chow films.