The term 'LET' is a three letter word that is often used to express permission or encouragement. It can also be used to suggest an idea or opinion. In this context, the phrase 'LET Me Think About It' implies that the speaker needs time to consider something before making a decision. This phrase can be used in a variety of situations, such as when someone is asked to make a difficult decision or when they are considering a new opportunity. It can also be used to politely decline an offer or request.