削尖脑袋往里钻

Traditional (Taiwan): 削尖腦袋往里鑽

xiāojiānnǎodaiwǎnglǐzuān ㄒㄧㄠ ㄐㄧㄢ ㄋㄠˇ ˙ㄉㄞ ㄨㄤˇ ㄌㄧˇ ㄗㄨㄢ

    • to use every means to get into a place or position

Character by character

Saying俗语俗語

Idiom惯用语 · In everyday use

Literally
sharpen your head to a point and bore in
Meaning
To use every means to get into somewhere or a position. Critical.

Sources