chicken-shit

/CH IH1 K AH0 N SH IH0 T/
noun
  1. 1

    Petty and contemptible thing(s).

    โ€œDon't waste your time on that chickenshit.โ€

  2. 2

    A coward.

    โ€œI told him I wasn't having his insults, and he just backed right down. What a chickenshit.โ€

  3. 3

    A low-ranking officer who lords over and needlessly makes life miserable for his underlings; a petty, abusive martinet.

adjective
  1. 1

    Petty and contemptible; contemptibly unimportant. (Compare bullshit.)

  2. 2

    Cowardly.

    โ€œHow chickenshit of that girl to just stand there and do nothing.โ€

Source: https://en.wiktionary.org/wiki/chicken-shit, https://en.wiktionary.org/wiki/chickenshit