As in smoking herbal substance; to inhale from a pipe or other smoking device, followed shortly by an exhalation into someone else's mouth. This term was developed by troops in Vietnam, who actually would put a marijuana cigarette into the open chamber of an unloaded shotgun and blow it into eachother's faces. An example of this can be seen in the movie "Platoon".
When you're smoking out, it's not considerate to shotgun with other people's girlfriends or boyfriends.
1. A multi-use term for many situations. Usually declared when a situation is screwed up ironically, or when no other explanation can be found.
2. short for gone Fucking AWOL (absolutely without leave) a military slang term for someone who went crazy and attempted to escape duties
1. You caught your wife in bed with the pastor of the church where they held your sister's funeral tonight? FUCKIN' A!
2. Pvt. Johnson went fuckin' A and tried to strangle his Sergeant.