The term 'SUPER SILLY' can be broken down into two crossword solutions: WACKO (5 letters) and SUPER (6 letters). WACKO is an informal term used to describe someone who is eccentric, crazy, or zany. It is often used in a humorous way to describe someone who is acting in an unusual or unexpected manner. SUPER is an adjective meaning of the highest quality, degree, or intensity. Together, the two words create the phrase 'SUPER silly, ' which is used to describe something that is extremely silly or ridiculous.