rocker
noun [ C ] uk/ˈrɒk.ər/ us/ˈrɑː.kɚ/
(CHAIR)
（摇椅的）弧形弯脚
one of the two curved pieces of wood under a rocking chair that allow it to move backwards and forwards
摇椅（同 rocking chair）
a rocking chair
(MUSIC)
摇滚歌手
a singer of rock music
an ageing rocker 上了年纪的摇滚歌星
US摇滚歌曲;摇滚乐迷
a rock song or a person who likes rock music
old-fashioned（尤指英国20世纪50年代穿皮衣、骑摩托车、听摇滚乐的）摇滚青年
a young person, especially in Britain in the 1950s, who wore leather clothes, rode a motorcycle, and listened to rock and roll music
Idiom
off your rockeridiom informal 发疯;做傻事
If you say that someone is off their rocker, you mean that that person is behaving in a very strange or silly way.