(1) A person who steers a ship- (can be metaphorical)
(2) A person who enjoys watching "spaccers" break dance to bob dylan, whilst playing a fruit machine.
(3) A person who enjoys having a good time and going to parties. Volatile when mixed with copious amounts of substance
(4) a member of a party going trio, i.e. the 3 bosoneers
(1)hey boson bose! how's it going?
(2) (by a boson) - wow, thats some crazy dancing!
(3) GFACL, want one?