simple past tense and past participle of knock one out

present participle of knock one out

(idiomatic) To knock someone down; to hit someone so they fall to the floor.

(idiomatic) To impress greatly; amaze; stun.

(idiomatic, ironic) Don't overexert yourself (in doing something that does not require much effort).

(idiomatic) To beat or strike someone. / (idiomatic) To thoroughly and decisively defeat someone in a physical fight, especially by knocking out that person.

(idiomatic) To defeat or overcome someone who was in a dominant position.

Alternative form of knock someone's block off

(slang) To strike a person in the head, causing them to fall to the ground, especially in an unconscious condition; to beat up a person.

(idiomatic, informal, hyperbolic) Used to express that one is greatly surprised.