(noun) Tried and true, faithful-to-the-end; unwaveringly
loyal to the core; your #1 ally when the shit goes down and your cause
may very
well be a lost one.
I was worried about John going to that part of town, but then I learned
Nikki was with him.
Nikki considers John a friend and is the downedest mother fucker I know. By me learning that I brushed my worries to the side.
Nikki would watch out for John and put John's well being above his own .