off your rocker

rocker | American Dictionary

rocker
noun[ C ]
us/ˈrɑk·ər/

rockernoun[C] (MUSIC)

infml
someone who performs or likes rock music

rockernoun[C] (MOVEMENT)

a rocking chair (= a chair built on two pieces of curved wood), or one of the two curved pieces under the chair that allow it to move forward and backward

Examples of rocker

rocker
A rocker is a chair that can be rocked back and forth.
Instead of confronting expectations of female rockers, their photographs depict the band simply speaking with and listening to each other.
This situation derived from the initially hostile performance environments encountered by 1950s rockers.
One does not often come across ' the male rocker', just ' the rocker'.
In the grand tradition, local rockers have employed such dichotomies within performance mythologies and marketing strategies.
Put rocker in the room in the middle of the picture.
Perhaps the presence of a politician keen to reminisce about his own teenage, mullet-headed years as a pub rocker is all that is needed.
Although his origins were actually in the earlier pub rock scene, his audience was undoubtedly swollen by a large contingent of punk rockers.
A rocker is a chair which can be rocked back and forth.
My generation, the punk rockers, grew up totally affected by the war.
Pairs of wheels mounted on rocker arms move independently over rough surfaces.
The rockers are not prepared to see it as a genre term that belongs exclusively to the bard poets, but link it to their own work.
Because she is using those songs to establish her own legitimacy as a rocker, she leaves them intact and performs them unironically - straight, so to speak.
It is estimated that the cost of replacing the rocker assemblies will be about £200,000.
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