The meaning of all life. Epicosity makes the world go round, it's what puts money in your wallet, and it's what puts prostitutes in your bed. It's what makes Chuck Norris so fit and tone.
Noun - A generic term referring to a land inside your head where everything you think is cool is compiled together as your own personal kingdom.
"only in Epicosity could I jump off this cliff and crack the earth a mile below and still be unhurt enough to kill chuck Norris' evil brother and save a baby hippo."