Black Adder (Filling out the MP form): “And your first name?”

Baldrick: “I don’t know.”

Black Adder: “Surly you must have some idea.”

Baldrick: “It might be Sodoff.”

Black Adder: “What?!”

Baldrick: “When I was a boy I used to tell the other boys, ‘Hello, my name is Baldrick’, and they would say, ‘yes we know, sod off Baldrick.”

Black Adder: “Okay, I’ll put S. Baldrick.”

Later, during the election interview;

Reporter: “Can you tell us what the S. in your candidate’s name stands for?”

Black Adder: “Sod off.”

Reporter (Taken aback): I guess it is none of my business.”

From Dish and Dishonesty (I did it from memory so the quotes may not be exact.)