Agnes Skinner is Principal Seymor Skinner's very controlling elderly mother.  Agnes was actually revealed to have adopted Seymour during "The Principal and the Pauper."  Agnes also often serves as a friend of Marge in many adventures.

Agnes Skinner Quotes

I was in love with a soldier boy on leave from Korea. It was a fifties style of romance, five minutes of sex and a lifetime of regret. He went back to his war and I went back to my dream of pole vaulting in the Helsinki Olympics. But there was a bump in the road, a bump named Seymore.

Agnes [in flashback]

Agnes: Where did you learn to sweep like that?
Marge: I've been training all my life. I once swept red wine off a white carpet.

The Simpsons Quotes

Horst: (Sinister) Okay, Mr. Burns, you win. But beware. We Germans aren't all smiles and sunshine.
Mr. Burns: (Sarcastic) Oooh, the Germans are mad at me. I'm so scared! Oooh, the Germans! (Hiding behind Smithers) Uh oh, the Germans are going to get me!
Horst: Stop it!
Man: Stop, sir.
Mr. Burns: Don't let the Germans come after me. Oh no, the Germans are coming after me.
Man: Please stop the "pretending you are scared" game, please.
Horst: Stop it! Stop it!
Mr. Burns: (Pause) No! They're so big and strong!
Man: Stop it.
Horst: Stop it, Mr. Burns.
Man: Please stop pretending you are scared of us, please, now.
Mr. Burns: Oh, protect me from the Germans! The Germans--
Horst: Burns, Stop it!

(Squishing an ice cream to his forehead) I'm a unitard!

Ralph