SLANGY REJECTION is a term used to describe a casual and informal way of saying no. The two most common crossword solutions for this term are IXNAY and NOPE, both of which have five and four letters respectively. IXNAY is derived from the Pig Latin phrase 'ixnay on the answeray', while NOPE is an informal way of saying no. Both terms are used to express a negative response in a casual and informal manner.