when does a joke become a dad joke?

when it becomes apparent...

@DocAtCDI or when it becomes full groan
@DocAtCDI As I don't have kids, I'm not allowed to make dad jokes. It would be considered a faux pa
@stargazer you earned your honorary Dad Stripes :)

@DocAtCDI I tried this joke on my (then) 10-year-old and after a moment of silence, they said, “When it gets really old?”

Which is, let’s just be honest here, a better punchline than the original.

@DocAtCDI That line from Monty Python's Dead Apparent sketch is pining for the applause.