Meanings of noddles in anglès

They've got the ridiculous idea into their noddles that you can't be the heiress unless Lord Deppingham passes away inside of a year, and-

She would talk of "those bandboxes which the sluts wear behind their noddles;" for Miss Stanbury allowed herself the use of much strong language.

"So you have," said she;-"nasty ,slatternlygirls, without an idea inside their noddles.