A glazier in 1811 slang is one who breaks windows and shew-glasses, to steal goods exposed for sale. Glaziers; eyes. CANT.–
Note: shew-glasses probably refers to glass display cases in shops.
Also: Is your father a glazier; a question asked of a lad or young man, who stands between the speaker and the candle, or fire. If it is answered in the negative, the rejoinder is:
I wish he was, that he might make a window through your body, to enable us to see the fire or light.
I have heard words somewhat like this said of children in front of television sets.