What is wack?

As an AI language model, I am not sure which specific topic pertaining to "wack" you are referring to, as the term may be used in different contexts. However, here are some general pieces of information:

• "Wack" is a slang term that often means "bad" or "unimpressive."
• It can also be used in the context of something being "crazy" or "offbeat," such as "That party was wack, they had a live goat in the living room."
• The term "wack" was popularized in hip hop and urban culture during the 1980s and 1990s and has since become a commonly used slang term.
• "Wack" can also be used as a verb to describe an action of hitting or striking something or someone, although this is a less common usage in modern times.