It is a humorous and ironic statement, which is used to describe the behavior of some people who deliberately create controversy, hype, gain attention or attract others' attention on the Internet.

"Pu" is the abbreviation of "PickUp" in English, and "eggplant" is often used to refer to men in Chinese network context. The meaning of the word "Pu eggplant" can be understood as that some people attract attention by creating controversy and hype, which is similar to the behavior of "hooking up" or arousing others' interest on the Internet.