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knock back

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knock someone back (an amount of money)

to cost an amount of money. That trip to Spain knocked me back almost $3,500. How much did that new furniture knock us back?

See also: back, knock

knock something back

Sl. to drink down a drink of something, especially something alcoholic. (See also knock back a drink.) I don't see how he can knock that stuff back. John knocked back two beers in ten minutes.

See also: back, knock

knock back

Also, knock it back. Gulp down an alcoholic beverage, as in He knocked back glass after glass of wine, or I hear you've been knocking it back a bit. [First half of 1900s]

See also: back, knock

knock back

v.

1. To hit someone or something abruptly, repelling it: With a swing of the racket, she knocked the ball back to her opponent. The blast from the explosion knocked me back into the fence. The post was crooked, so I got a hammer and knocked it back into place.

2. To drink something, especially an alcoholic drink, quickly or in large amounts: After he knocked back six beers, we took his car keys away. She knocked the rest of the bottle back and went to bed.

See also: back, knock