Because the German Language doesn't differentiate between friend and boyfriend, you call your male friends "Kumpel", to ensure a newly met person, knows that he's not your boyfriend, but instead your friend.
Example:
Mein Kumpel hat neulich. . . -> "my friend has recently . . ."
Mein Freund hat neulich. . . -> "my boyfriend has recently. . . " or "my friend has recently . . ."
May also be used by hetero males to make clear they are straight.
Mein Kumpel, mitdem ich oft rumhänge, macht ständig zweideutige Witze.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.