The term 'It's Out on a Limb' is composed of four words, each with four letters. The first word is 'LEAF', which is an organ of a plant that is typically flat and thin, and is green in color. The second word is 'ULNA', which is the longer of the two bones in the forearm. The third word is 'TWIG', which is a small branch of a tree or shrub. The fourth word is 'HAND', which is the body part at the end of the arm that is used for grasping and manipulating objects. Together, these four words form the phrase 'It's Out on a Limb', which is used to describe a situation where someone is taking a risk or making a bold move.