Sticking one's neck out is a phrase that means taking a risk or exposing oneself to potential harm or criticism. Antonyms for this phrase include playing it safe, staying cautious, avoiding risks, and being conservative. These antonyms suggest a reluctance to take bold actions or make bold decisions, instead choosing to remain in a state of comfort and security. While playing it safe may result in fewer negative consequences, it also may limit opportunities for growth and success. Thus, it is important to strike a balance between taking calculated risks and staying cautious in order to achieve one's goals.