赤膊上陣

赤膊上阵
chìbóshàngzhèn
  1. lit. to go into battle bare-breasted (idiom)
  2. fig. to go all out
  3. to come out in the open

CEDICT

  1. (figurative) to go all out; to go full speed ahead; to do something (often bad) without reservations or concealment
  2. to go all out; to go full speed ahead; to do something (often bad) without reservations or concealment
  3. to go into battle barechested

Wiktionary

Entry Composition

1 赤膊 chìbó bare to the waist
2 上陣 shàngzhèn to go into battle