British slang meaning sex in the same was as "How's your father" does. Originates from the lyrics to the song South Bound Saurez by Led Zeppelin in which vocalist Robert Plant uses the phrase "Just a little bit o' sweet, sweet Connie"
You have your hair cut, coloured and styled in a top salon by a man wearing more make-up than you. He tells you the cost of your new barnet - you gasp, then mutter "'sweet italian fucking jesus!' I won't be coming back here again"