複習brush

After he jumped off, he stood up and brushed himself off.

a trooper was shot by friendly fire

to remove something with a brush or with your hand
brush sth off/from etc sth
　Ella brushed the crumbs off her jacket.
　He brushed the tears from his eyes.
to touch someone or something lightly when passing them
　Something brushed her shoulders.

brush yourself down
to use your hands to remove dirt from your clothes, especially after you have fallen
a time when you only just avoid an unpleasant situation or argument

brush with
　His first brush with the law came when he was arrested for disorderly behaviour.
　A brush with death can make you appreciate life more.

brush up (on) [brush up (on) sth]
to practise and improve your skills or your knowledge of something that you learned in the past
　I must brush up on my French before I go to Paris.

If you have a brush with someone, you have an argument or disagreement with them.