The artful dodge of putting down an activity someone finds an interest in. There's an
implication that there's something wrong with the person who likes
the activity, but because it's not spelled outright, there's
plausible deniability.
Person A: I don't get why people like
sportsball. It's so boring.
Person B: You're humbugging me because I like baseball?
Person A: I didn't say
you're bad for liking sportsball...
Person B: No, but there's a strong
implication there.