Petty and contemptible thing(s).
Don't waste your time on that chickenshit.
A coward.
I told him I wasn't having his insults, and he just backed right down. What a chickenshit.
A low-ranking officer who lords over and needlessly makes life miserable for his underlings; a petty, abusive martinet.
Petty and contemptible; contemptibly unimportant. (Compare bullshit.)
Cowardly.
How chickenshit of that girl to just stand there and do nothing.