NIP's partner is TUCK, a four-letter word. TUCK is a term used to refer to the act of folding or bending something in order to make it fit into a smaller space. It is commonly used when referring to clothing, such as tucking in a shirt or tucking a blanket around someone. It can also be used to refer to the act of folding paper or fabric to create a neat and organized look. The term is derived from the Old English word 'tucian, ' which means to fold or bend.