The line comes from King of the Hill, the animated sitcom created by Mike Judge and Greg Daniels that aired on Fox from 1997 to 2010. Hank Hill, the propane salesman voiced by Judge, scolds his son Bobby with 'Dammit, Bobby' whenever the boy disappoints him, and the phrase became one of the show's most quoted catchphrases. As the series lived on through reruns and streaming, the line was clipped into reaction soundboards and meme edits, where it survives as shorthand for paternal disappointment aimed at any small, funny failure.