Has an AFL game ever ended 140-121?
Exactly once. On May 12, 1973, Essendon beat St Kilda 140-121, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 140-121 in league history.
That makes 140-121 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 141-121 has happened 1 times and 140-122 has happened never.