The term 'Pig Latin Negative' is a play on the phrase 'pig latin, ' which is a language game in which words are altered by moving the first letter to the end of the word and adding the suffix '-ay.' The crossword solution for this term is 'IXNAY, ' which is the Pig Latin version of the word 'NIX, ' meaning 'to reject or forbid something.' Therefore, the term 'Pig Latin Negative' can be interpreted as a way of saying 'NO' or 'FORBIDDEN.'