Emulate Daffy Duck is a phrase that refers to imitating the behavior and mannerisms of the iconic Looney Tunes character, Daffy Duck. One way to do this is through the programming language LISP (4 letters), which stands for 'LISt Processing' and is used to create computer programs. It is a high-level language that allows users to write code quickly and efficiently. By using LISP, one can emulate Daffy Duck by creating programs that mimic his behavior and mannerisms.