No, it wasn't some weird dream you had, D. C. Thomson really did produce an entire comic based around the ultra-homely Bash Street Kid. Plug ran for just 75 issues between September 1977 and February 1979, after which it merged into the Beezer; its demise is often blamed on its considerable production values such as use of gravure painting, higher-quality paper, and more pages in technicolour than other D. C. titles, which made it almost twice as expensive as other comics of the time. (The paper used did seem to make this an easier scanning job, at least.)
Plug has been considered an attempt by D. C. to ape the style of the wackier comics published by rivals Fleetway (something they would later manage more successfully with Nutty), which probably accounts for the use of an existing D. C. character; many Fleetway titles had a character serve as the comic's 'host' (the most salient comparison being the eponymous Buster). I suppose the exact sequence of events that led Plug to be the lead is lost to time, but it's easy to imagine D. C. wanted the role to go to a pre-existing character, it made sense to promote a member of an ensemble, and Plug was the most distinctive character in that window.
The issue of Plug I have scanned in today to add to my growing collection of mayflies is one of the final ones -- the Christmas 1978 issue, number #67. So let's go!








