bruv is a word used by SPAHCRAB non-sparingly. It's history steams from the lowest class of British citizens known as "Chavs" using it as a greeting. E.g: Alright Bruv.
The origins of the word could be found back when SPAH was working in youth work, dealing with Young People that used the word frequently. It soon got into SPAH's vocabulary, and became one of his most used words.