HSK V7-9
Correct

敲边鼓

/ qiāobiāngǔ / 
Strokes

Definition

to back sb up/to support sb in an argument/(lit. to beat nearby drum)

Example

As a Verb

speak or act to assist sb from the sidelines; back sb up

1
Zhè
这
jiàn
件
shì
事
nǐ
你
chūmǎ
出马
  
,
wǒ
我
gěi
给
nǐ
你
qiāo
敲
biān
边
gǔ
鼓
  
。

You take up the matter and I'll back you up from the sidelines.