Abraham Jebediah "Abe" Simpson II, also known as "Grifty McGrift" and "Grampa Simpson", or simply as "Grampa", is the patriarch of the Simpson family, the father of Homer, Herbert and Abbie Simpson, father-in-law of Marge, and the paternal grandfather of Bart, Lisa, and Maggie Simpson. He is also the ex-boyfriend of Jacqueline Bouvier, his daughter-in-law's mother.
Abe is a World War II veteran who was later sent to the Springfield Retirement Castle by Homer. He is known for his long, rambling, and often inaccurate stories and general incompetence.
Meltdown at 7-G
He was seen being cared for by Marge during the attack of the Micro Managers, before being knocked over by Krusty.