Southern slang used by honky-tonk red necks to try to sound more sophisticated. Means 'not going to lie'.
Billy Joe: Yep de'r some bign's in that there lake Karl.
Karl: Yee buddy, noganal lie I saw one of 'dem suckers swimmin' back yonder.
Billy Joe: Woo buddy, you sounded so sofis'toekated right d'er Karl!