Buggin

When someone or something is acting bizarre, it's buggin. For example, if your friend is slurring his speech or making odd decisions, you might say, "Why you buggin, my man?"

Origin of buggin

The slang term buggin originated in the early 1990s. Various rap artists, such as Jay-Z, The Notorious B.I.G., Wu-Tang Clan, A Tribe Called Quest, and Eminem, popularized it.

The term originally comes from a bug or pest that is annoying you. At the time, people primarily used the term to describe others that were annoying them. However, since then, many people have begun using it to refer to people acting odd or strange (which may also be annoying).