| Idiom | Meaning | Example |
| knock up [B] |
become pregnant, in a family way
|
She doesn't want to get knocked up, so she uses a contraceptive.
|
| knock you down a peg |
say you are too proud, put him in his place
|
If you are too cocky, Don will knock you down a peg.
|
| knock you out |
amaze you, blow your mind
|
You should see The Phantom of the Opera. It'll knock you out.
|
| knock your socks off |
surprise you, perform better than you expect
|
This music will knock your socks off! It's rock and roll!
|
| knocked out |
eliminated from a competition or series
|
Our team was knocked out during the semi-final games.
|
| knockout |
stunning appearance, beautiful body
|
When Jackie wears that red party dress, she's a knockout.
|
| know better |
know you should not do that
|
Why did you take the candy? You know better than to steal.
|
| know inside out |
know a method well, know an occupation well
|
After 30 years in real estate, he knows the business inside out.
|
| know like the back of your hand |
know an area well, know every feature of the land
|
I lived here for years. I know this town like the back of my hand.
|
| know the first thing... |
(See don't know the first thing about)
|
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