lose (one's) mind

(redirected from lost their mind)

lose (one's) mind

To become crazy or mentally unsound; to become extremely foolish or foolhardy. I'm going to lose my mind if I have to hear that song one more time! I think Jane's grandmother has lost her mind lately. You must have lost your mind if you think that's a good idea!
See also: lose, mind

lose one's mind

Also, lose one's reason. Go crazy, lose one's sanity, as in I thought she'd lost her mind when she said she was going ice-fishing, or That assignment is enough to make me lose my reason. The first expression dates from the late 1500s; the second employs reason in the sense of "unimpaired mental faculties," a usage dating from the late 1300s. Also see under go out of one's mind; have all one's buttons.
See also: lose, mind

lose your ˈmind

become mentally ill
See also: lose, mind
References in periodicals archive ?
The Year Canadians Lost Their Minds Tom Hawthorn Douglas & McIntyre c/o Harbour Publishing PO Box 219, Madeira Park, BC, Canada, V0N 2H0 www.
The separated, the divorced, and the drunks of course The people who are blind, and those who have lost their minds.
It seems the ball sponsors have lost their minds as well.
After reading an article by Troy Anderson titled "Welfare to kids of illegals at $276 million" and reading that the California university system is proud of the fact that there are 100 illegals attending classes, one must assume that the California taxpayers have either lost their minds for putting up with these criminal actions or have just thrown in the towel.
Muhammad, hundreds of Americans have lost their minds and used guns to cause multiple deaths," notes the October 25th Toronto Globe and Mail.
She wondered if her eyesight had gone--or if her students had lost their minds.