Dirty Blues - Wiki entry.
Dirty blues encompasses forms of blues music that deal with topics that are sometimes considered taboo in society, including sexual metaphors and/or references to drug use of some kind. Due to the sometimes graphic subject matter, such music was often banned from radio and only available on a jukebox. The style was most popular in the years before World War II and had a revival in the 1960s.
Fuzzy guitar blues may have dirty guitar playing but it's not filth. .
