The term 'Boo Follower' is composed of four words, each with a different number of letters. The first word is 'Hoo, ' which is three letters long. This is an onomatopoeic word used to represent the sound of a monkey or an owl. The second word is 'HISS, ' which is four letters long. This is another onomatopoeic word used to represent the sound of a snake. The third word is 'Yah, ' which is three letters long. This is an exclamation of joy or surprise. The fourth and final word is 'HooHoo, ' which is six letters long. This is a combination of the two onomatopoeic words 'Hoo' and 'Hoo, ' which are used to represent the sound of an owl. Together, these four words form the term 'Boo Follower, ' which is used to describe someone who follows the sound of a ghost or a spirit.