放浪形骸

fànglàngxínghái
to abandon all restraint (idiom)

CEDICT

to refuse to be bound by convention; to abandon oneself to Bohemianism

Wiktionary

纵情放任，没有约束。

重編國語辭典

Entry Composition

1 放浪 fànglàng
  1. unrestrained
  2. dissolute
  3. dissipated
  4. unconventional
  5. immoral
  6. to debauch
  7. to dissipate
2 形骸 xínghái
  1. the human body
  2. skeleton