Referring to angry red heads, derived from the common nick name for red heads Ranga's after Orang-utans and the tendency for red heads to have fiery tempers. A red heads type of angry is very unique so therefore it seems reasonable for them to have their own word.
Dave, the office red head became very rangry, you could tell his temper was boiling from the way his face had turned the same colour as his hair!!
being both angry and filled with rage
angry = yelling
rage = punching someone
rangry = yelling while bashing a glass vase into someones skull