A thug or villain.
- ‘The filmmakers' desire to create an unstuffy, modern version of the Renaissance monarch merely turns him into a boorish, violent plug-ugly.’
- ‘A broad plug-ugly was trying to twist around, shaking and shimmying his forearm caught by her hands.’
- ‘Two huge plug-uglies stood on either side of the door, arms folded.’
Very ugly.‘that was one plug-ugly dress’
- ‘Okay, so you are not plug-ugly and you don't find it impossible to lure women into your dizzying orbit, but just what is it about you that turns out to be so utterly repellent?’
- ‘But the belt clip is plug-ugly and poorly designed and oversized - what happened, it seems to have been made and fitted by a different company?’
- ‘He has gone off for good with that plug-ugly researcher.’
- ‘Gone were her cauliflower ears, gone was her pug nose, her squat face had ballooned out, her once squinty eyes were now just slits in her plug-ugly face.’
By association with the verb plug in the informal sense hit with the fist.