A bro who's there for you through it all. When he's around all your problems and their solutions go from I to We.
He's not content putting in the bare minimum; he's got a train to move, and no man gets left behind.
The word is said to come from the Indian word "Ghee" which is a clarified butter. Irish troops who were stationed in India as part of the British colonial army are said to have introduced the word into Ireland, it was first used to describe vaginal juices.