the puckered look of suprise or shock, either a temporary expression or an unfortunately permanent display of natural looks fugly, bulldog chewing a wasp
i don't like the way your gran looks at me, she's got a face like a smacked arse!
When a male/female (usually a pale Caucasian who burns easily) has severe sun burn on his/her skin so instead of looking like the sun gently kissed them (sun kissed) he/she look like the sun smacked him/her in the face.
After spending 8 hours in the sun yesterday without sun screen it looks like Melanie is sun smacked.