reffers to someone who is completely and utterly unable to hang in social situation. sometimes segregating themselves entirely before events just to try and save face.
to bow out of an otherwise social activity (shots, thc smokage, beer can shotgunning..)
to agree to something until date (or time) of promise only to have change of heart and suddenly neglect responsabilities.
examples..
friend 1: where is Andrew at? i thought we were all taking shots
friend 2: pfft, that guy.. he's booning out
can also be used as an adverb
friend 1: i thought Moe was comming to the show tonight?
friend 2: what can i say? dude booned out
Adjective
1) A generic term for attempting to impress your peers.
2) Having feelings of sexual arousal whilst demonstrating your masculinity.
3) Can be used as a term for excessive consumption e.g bosing out on fairycakes
Reference: Used by Arnold Schwarzenegger in the body building documentary "Pumping Iron".
Origins
The origins of the word have been hotly debated by academics and linguistic theorists worldwide. However, the most widely accepted explanations are: It is a combination of the words boss (a person who is (or believes s/he is) in change, and pose (to show-off); It is an adjective coined by bodybuilders in the late 70’s as a collective expression for the various poses they use on stage in ‘Mr. Universe’ style competition (e.g. “I was bosing out on stage in front of thousands of people”)
Modern usage
It has since been adopted by youth culture in the west where it is used as a prefix as well as a separate word (e.g. the scat-fest was bosetastic last night). This has led to the term transcending any singular or definable meaning and has instead become an attitude, behavior, comportment, appearance, style and Zeitgeist of post modern pop-culture.