KY ... In your world this is likely not the best answer:
chickĀ·en hawk
1. a hawk of a type that is reputed to prey on domestic fowl.
maybe?
1. informal ... an older man who seeks younger men or boys as sexual partners.
naawww !
2. informal ... a person who speaks out in support of war, yet has avoided active military service.
Where I come from we call that type 'a lily livered chicken shit !
There are lots of those types around. I just saw one about 15 minutes ago. His stink breezed across my path.