take (something) into (one's) head(redirected from they have taken it into their heads)
take (something) into (one's) head
To believe that something is true. Take it into your head: I'm in charge until Mom gets home, so you have to listen to me. A: "Why is Johnny holding his breath?" B: "Well, he's taken it into his head that holding his breath will make him taller."
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
take something into one's head
Fig. to get an obsession or overpowering idea into one's thinking. George took this strange idea into his head about fixing the car himself. I don't know why she took that strange idea into her head.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
take it into your head
If somebody takes it into their head to do something, especially something strange or foolish, they suddenly decide to do it. He suddenly took it into his head to go out to Australia to stay with his son.
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
take into one's head, to
To conceive an idea. This vivid image of putting an idea inside one’s head was already known about 1700. Joseph Addison used the expression (The Spectator, 1711): “When every Body takes it in his Head to make as many Fools as he can.”
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer