To back down, give up, or otherwise
change one's mind to engaging or completing a given task, circumstance, or opportunity, often out of
fear or lack of will
Chicken (of a person) - A person who has backed down or given up on a task, circumstance, or opportunity,
"I can'
t do this any longer, I'm going to chicken out!" (To) Chicken Out
Chicken (of a person) - "We'll see you later then,
chicken."