The term 'little fellow' can be broken down into four different words: LAD (3 letters), TYKE (4 letters), PEEWEE (6 letters), and TAD (3 letters). LAD is a term used to refer to a young man, usually between the ages of 12 and 18. TYKE is a term used to refer to a small child, usually between the ages of 3 and 7. PEEWEE is a term used to refer to a very small child, usually between the ages of 2 and 4. Finally, TAD is a term used to refer to a very young child, usually between the ages of 1 and 2. All of these terms are used to describe a 'little fellow, ' or a young child.