What is the origin of the word, 'broheim', used as meaning friend?

"A Broheim (bro-haIm) Is an increasingly popular blend greeting created by the US expatriate communities in Pan-Germanic Europe and the Nordic countries. The term literally translates to mean "Bro Home", however it has taken on the connotation of a term of endearment, and effectively means "Friend" or "My Brother" in local context. It is similar in vocative terms to "mate", "pal", "buddy", "dude", "man", and "che" in various other cultures."

http://www.urbandictionary.com/define.php?term=broheim

I have been puzzled by the various proununciation variants of this term since it started cropping up.

If it is of German origin...the second syllable should be pronounced "hime"
the same as heim in the Heimlich maneuver of choke rescue fame. Dutch could put a slightly accented twist on it...but not as far over toward the English long E sound as "broheem"...as some say it, and I have no idea how the "l" sound got there for the way some others say it.

http://www.merriam-webster.com/dictionary/Heimlich%20maneuver