BAN
Broke Ass Nobody - originally Broke Ass Nigger, but many aren't Black so why limit? - is said of some guy who is pennyless, looks scruffy, and is generally below your personal standard.
BAN
Body Area Network. That is a network that persists around the body. Mainly using Bluetooth as the medium but there is a move to WiFi to connect ones personal technology. It is mainly found truly satisfying by geeks, middle mamangement and men with no sex life.