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be off (one's) rocker

To be crazy or mentally unsound; to be extremely foolish or foolhardy. I think Jane's grandmother is a little off her rocker these days. You must be off your rocker if you think that's a good idea!
See also: off, rocker

go off (one's) rocker

To become crazy or mentally unsound; to become extremely foolish or foolhardy. I'm going to go off my rocker if I have to hear that blasted song once more! I think Jane's grandmother has gone off her rocker lately. You must have gone off your rocker if you think that's a good idea!
See also: go, off, rocker

off (one's) rocker

Crazy; mentally unsound; extremely foolish. I'm going to go off my rocker if I have to hear that song one more time! I think Jane's grandmother is a little off her rocker these days. You must be off your rocker if you think that's a good idea!
See also: off, rocker

*off one's rocker

 and *off one's nut; *off one's trolley
Fig. crazy; silly. (*Typically: be ~; go ~.) Sometimes, Bob, I think you're off your rocker. Good grief, John. You're off your nut.
See also: off, rocker

off one's head

Also, off one's nut or rocker or trolley or chump . Crazy, out of one's mind, as in You're off your head if you think I'll pay your debts, or I think Jerry's gone off his nut over that car, or When she said we had to sleep in the barn we thought she was off her rocker, or The old man's been off his trolley for at least a year. The expression using head is colloquial and dates from the mid-1800s, nut has been slang for "head" since the mid-1800s; rocker, dating from the late 1800s, may allude to an elderly person falling from a rocking chair; trolley, also dating from the late 1800s, may be explained by George Ade's use of it in Artie (1896): "Any one that's got his head full of the girl proposition's liable to go off his trolley at the first curve." The last, chump, is also slang for "head" and was first recorded in 1859.
See also: head, off

off one's rocker

Also, off one's nut or trolley . See off one's head.
See also: off, rocker

off your rocker

If someone is off their rocker, they are crazy. He must be off his rocker, paying that much for a shirt! Note: You can also say that someone goes off their rocker to mean that they become crazy. Sometimes I think he's going off his rocker.
See also: off, rocker

off your rocker

crazy. informal
A rocker in this expression is a concave piece of wood or metal placed under a chair or cradle enabling it to rock back and forth.
1932 Evelyn Waugh Black Mischief It's going to be awkward for us if the Emperor goes off his rocker.
See also: off, rocker

ˌoff your ˈrocker

(informal, spoken, especially British English) (of a person) crazy: Spend a thousand pounds on a dress! Are you off your rocker?
See also: off, rocker

off one’s rocker

mod. silly; giddy; crazy. (see also rocker.) That silly dame is off her rocker.
See also: off, rocker


1. n. a rocking chair. (Not slang.) I love to spend a sunny afternoon in my rocker.
2. n. a rock and roll singer, song, or fan. (see also off one’s rocker.) Let’s listen to a good rocker.

off (one's) rocker

Out of one's mind; crazy.
See also: off, rocker

go off one's chump/head/rocker, to

To go crazy; to become insane. The oldest of these three expressions is “off his head,” which was current although slangy by the time Thomas Hood wrote The Turtles (1844), “He was ‘off his head.’” The word chump became British slang for “head” in the late nineteenth century; subsequently, “off his chump” was used several times by Shaw, in Pygmalion and Heartbreak House. Off one’s rocker comes from the same period, but its origin is more puzzling. One writer suggests it may indirectly allude to the elderly, associated with both rocking chairs and diminished mental capacity. Yet another variant is to go off one’s trolley, which alludes to a motorman getting off a streetcar to reposition the trolley wheel on the overhead wire that carried electric current to the car’s motor. To be disconnected from this power source came to mean becoming crazy, a usage dating from the late 1890s. With the demise of streetcars in many American cities, this expression is heard less often today.
See also: chump, go, head, off

off one's head, rocker, etc.

See go off one's head.
See also: off
References in periodicals archive ?
In the first phase, 1895-1914 Rocker became an 'anarchist missionary to the Jews' (Fishman 1975), becoming closely identified with the Jewish immigrant workers of London's East End.
They are cowboys, popularly known as 'the rockers' or 'Marock' in Botswana.
The thread type of the rocker arm's elephant foot (e-foot) screw is changed from machined to rolled and corresponding groove at rocker arm side is removed to eliminate the risk of notch effect at the second phase of the design process.
Potential licensees in the baby products industry are currently being targeted as candidates to eventually commercialize the Baby Rocker on a worldwide basis.
"Above all of this sits the one issue few members of the GOP, even fewer conservative pundits and, worse, even the National Rifle Association, fail to realize is the pressing matter of our age: President Barack Obama's decision to use the political capital garnered from the Sandy Hook tragedy to make an all-out assault on gun ownership," wrote Rocker.
My confidence in West End Rocker, grossly overpriced at 33-1, was undiminished until the sixth fence, better known as Becher's, where he was brought down.
West End Rocker was campaigned solely last season with the John Smith's Grand National in mind and did not see a racecourse since the Becher.
"Get down!" she screamed as he bounded from one ledge to another and a dragon jumped up, taking the opportunity to attack him, only Rockers brown hair could be seen above the line of the building.
* 1500 standard and 1300 high inrush rocker single-pole switches.
William Christian Rocker of Tampa has submitted an application for Bar readmission.
Over 100 Russian and Romanian rockers from the international club "Night Wolves" staged a gathering on the Danube bridge linking Bulgaria and Romania on their way to a Bulgarian rocker gathering.
One of the chief protagonists today is Alan King's West End Rocker, who could put himself in line for a bonus of pounds 250,000 if he can land the Grand National Trial (3.20pm) and then take the Aintree showpiece on April 9.