charva
This originates from 19th Century parlance and, being used as a descriptive noun, was originally attributed to a prostitute.  Later this gave rise to a verb whereby a person was 'charvered' or 'f#cked', this in the context that the person in question was beaten up or generally antagonized by low-life. This then went full circle to describe the antagonist as a 'Charva'.  In latter days, 'Charvae' have adopted the name as a term of endearment amongst themselves, despite being a term used to describe them as low-life scum who need to be humanely destroyed.