A really old person who has no idea what a phone is and constantly tells you about 'back in their
day' which was WAY back before even your grandparents were born.they can often be rude and
people use 'old fart' as an insult to a non modern,or
lame person.
Bob: let me tell you about how it was back in my
day,when we didn't have phones or medicine or anything
Becky:No you old fart I
don't wanna hear it