Hilda Baker had an act where she appeared with a man dressed as a woman called Cynthia, who never said a word. Hilda would cock her head at Cynthia from time to time and say, "She knows, y'know!" My mother picked this up and used to drove us crackers with it.
My dad whenever he had a joint of meat would always say, "Very tender, very sweet!", which was the catch-phrase of some long-forgotten comedian. Cpl Jones used to come out with it on Dad's Army, but it was much older than that.
Big Gee