rocker Definition

rock²
verb rocked, rocking

tr & intr
1. To sway or make something sway gently backwards and forwards or from side to side.

Example: rock the baby to sleep
tr & intr
2. To move or make something move or shake violently.

Thesaurus: sway, swing, pitch, reel, lurch, shake, tilt, toss.
3. colloq
To disturb, upset or shock.
Example: The news rocked the sporting world
Thesaurus: stun, astonish, astound, surprise, jar, dumbfound, shock, shake up.
intr
4. To dance to or play rock music.

noun

1. A rocking movement.
2. A form of popular music with a very strong beat, usually played on electronic instruments and derived from rock and roll.

Form: rock music (also)
3. Rock and roll.

Derivative: rocker

See separate entries.

Idiom: rock the boat

To destabilize or disturb something especially unnecessarily or out of spite.

Etymology: Anglo-Saxon roccian.

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rocker
noun

1. One of usually two curved supports on which a chair, cradle, etc rocks.
2. Something that rocks on such supports, especially a rocking chair.
3. Someone or something that rocks.
4. A device which is operated with a movement from side to side, backwards and forwards, or up and down. Also as adj.

Example: rocker switch
(Brit)
5. In the 1960s: a follower of a sometimes violent teenage movement, typically wearing a leather jacket and riding a motorcycle. Compare mod¹ (noun).

Form: Rocker
6. An object with a part which is curved like a rocker, especially a skate with a curved blade.

Idiom: off one's rocker

colloq
Mad; crazy.