What does fat back mean in slang? September 14, 2022December 28, 2023BRA 0 fatback. / (ˈfætˌbæk) / noun. the fat, usually salted, from the upper part of a side of pork. Slang.Related Posts:Strengthen Your Back Muscles & Shape Your Back -…Goodbye Back Flab, Hello Sleek Back: The Best Back FatNo More Unwanted Back Bulge: Proven Strategies for…