1. Larry helped me when no one else would, and I would do the same for him. I don’t mind sticking my neck out for a friend like him.
2. Jack was too scared to stick his neck out and stand with the rest of the workers in their demands for better working conditions. He was afraid he would lose his job.

Synonym: go out on a limb. The expression suggests that sticking one’s neck out may lead to having one’s head chopped off.