I've never actually seen a bulldog do this, but we've just had someone in our office that's doing a pretty damn good impression thereof. Can't name names, but she's the most miserable moaning depressing old hag since my Aunty Joy (very in-aptly named.....)
What other expressions do you like, or are particularly amusingly descriptive?
"She's (But definitely NOT Salla) got a face like a bag of slapped tw@ts" is the terminology of the icy, frozen smoglands of the People's Republic of Teesside