The term 'Simpson Imp' is a reference to the popular animated television series The Simpsons. The crossword solutions for this term are 'BART, ' which is the name of one of the main characters in the show. BART Simpson is the mischievous and rebellious son of Homer and Marge Simpson, and is known for his catchphrase 'Ay Caramba!' He is often seen getting into trouble with his friends and family, but always manages to learn a lesson in the end.