The term 'They're Not To Be Believed' is composed of five words, each with a different number of letters. The first word is 'Shams', which has five letters. This word refers to something that is false or deceptive. The second word is 'QUACKS', which has six letters. This word is used to describe someone who pretends to have knowledge or skill in a certain area but actually does not. The third word is 'YARNS', which has five letters. This word is used to refer to stories that are often exaggerated or untrue. The fourth word is 'Talltales', which has nine letters. This word is used to describe stories that are highly exaggerated and often unbelievable. The fifth and final word is 'Lameexcuses', which has eleven letters. This word is used to describe excuses that are weak or unconvincing. All of these words together form the phrase 'They're Not To Be Believed', which is used to describe something that is not trustworthy or believable.