The term IT MAY HAVE A SOFT SHELL can be solved by the four letter word 'TACO'. Tacos are a popular Mexican dish consisting of a corn or wheat tortilla filled with various ingredients such as meat, cheese, beans, lettuce, and salsa. They are usually served with a side of guacamole and sour cream. Tacos are often served with a soft shell, which is a type of tortilla that is lightly fried and folded in half.