冲天炮

Traditional (Taiwan): 衝天炮

chōngtiānpào ㄔㄨㄥ ㄊㄧㄢ ㄆㄠˋ

    • blunt, rash person who is first to challenge or object

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
skyrocket firecracker
Meaning
A blunt, rash person who is first to raise a challenge or object. Slightly critical or teasing.

Sources