‘You are smug’

I was born in 1945, so as an old girl I went from the nursery at 4yrs,and straight through the primary an then the Senior girls which were seperated as you mentioned.I remember Miss Slade with her horn rimmed specs and Miss Robinson whose usual expression was YOU ARE SMUG,I wonder if she said it to others or was it just to me; There was also Miss James during my time who took us for science,very strict and old fashioned with her hair in a severe bun,If she liked you then you were ok and thankfully she was ok with me,then there was Miss Roberts who taught us German and which I have retained some to this day,Our uniform was maroon blazer and grey skirt for us girls,I hated school BUT now recall those days with fondness and wish I had applied myself,I was Hazel Harris then,and left in 1960.