Grumpy Old Men

Grumpy Old Men is a movie starring Jack Lemmon, Walter Matthau, and Ann-Margret. A lifelong feud between two neighbors since childhood only gets worse when a new female neighbor moves across the street.
For decades, next-door neighbors and former friends John and Max have feuded, trading insults and wicked pranks. When an attractive widow moves in nearby, their bad blood erupts into a high-stakes rivalry full of naughty jokes and adolescent hijinks.