idiot humming
When someone absentmindedly hums a tune over and over to themselves, much to the annoyance of people around them.
Mrs. Mandrake: (humming Star Wars theme) "Duuh Duuh da da da Duuh Duuh da da da Duuh Duuh dun-dun-dun-duuuuh..."
Mr. Mandrake: "Uh, are you just going to keep idiot humming all night?"
Mrs. Mandrake: "What?... oh the humming! Sorry, I have Star Wars stuck in my head."
Mr. Mandrake: "I know."
...5 minutes later...
Mrs. Mandrake: "Duuh Duuh da da da Duuh Duuh..."
Mr. Mandrake: "Uh, are you just going to keep idiot humming all night?"
Mrs. Mandrake: "What?... oh the humming! Sorry, I have Star Wars stuck in my head."
Mr. Mandrake: "I know."
...5 minutes later...
Mrs. Mandrake: "Duuh Duuh da da da Duuh Duuh..."