A name for someone who communicates in a very abrupt, incoherent, and cryptic manner which provides no background or context, thereby confusing their audience.
An example of a Busi is someone who walks up to you out of the blue and says "So that thing from last week...I fixed that." and expects you to know exactly what they are referring to. You have to pull additional information out of the Busi in order to figure out what the hell they are talking about.
Many Busis have ADD, which causes their thoughts to jump from topic to topic, and leads to the incoherent communication.