knows all your shit good and bad (with no judgments on it), bail money, on the same page about the important things in life, got your back no ?'s asked, wont steal your girl and vice versa (and wont let anyone else), you can butt heads over something and crack beers two minutes later...thats for starters, i got about 2 or 3 peeps like that unconditional, but its tough to find the lifers...