K

[know the score]

See: [THE SCORE].

[know what's what]

See: [KNOW SOMETHING INSIDE OUT].

[know which side one's bread is buttered on]  {v. phr.}

To know who can help you and try to please him; know what is for your own gain.

[know which way to turn]

See: [NOT KNOW WHICH WAY TO TURN].

[know-how]  {n.},  {slang}

Expertise; ability to devise and construct.

[know-it-all]  {n.}

A person who acts as if he knows all about everything; someone who thinks no one can tell him anything new.

After George was elected as class president, he wouldn't take suggestions from anyone; he became a know-it-all.

- Also  […]

[knowledge]

See:

[A LITTLE KNOWLEDGE IS A DANGEROUS THING],

[TO THE BEST OF YOUR KNOWLEDGE].

[knuckle]

See:

[BUCKLE DOWN] or [KNUCKLE DOWN],

[RAP ONE'S KNUCKLES].

[knuckle down]

See: [BUCKLE DOWN].

[knuckle under]  {v. phr.}

To do something because you are forced to do it.

Bobby refused to knuckle under to the bully.

Compare: [GIVE IN].