urban dictionary defines a rude girl as a dedicated ska fan, with a sense of history, style of the ska scene, also known as rudi, roody, rudy, etc. traditional of the "rude boy/girl" is clothing similar to that of the swing dancers of the 1940’s or that of the historic gangsters akin to al capone.
just to clarify the blogger name. i'm not impolite, just a fan. i guess i should also define ska.
ska: three different types: "traditional", "2-tone" and "3rd wave". traditional came about in the late 1950s as new dance music straight out of jamaica. 2-tone is named such because whites and blacks came together to form ska bands to spread unity in the 1970s. 3rd wave is when ska hit america in the late 1980s, and added a bit of punk flair.