Evenings in the Batcave…
Batman: *typing on the Batcomputer*
Red Robin: *tuning up the Redbird*
Batman: Fart.
Red Robin:
Red Robin: Uh…
Red Robin: Did you say “fart”?
Batman: Yes. That’s me being rather silly.
~ • ~ • ~ • ~ • ~
And, to this day, no one believes Tim.

Superman: *fighting Parademons on Apokolips*
Superman:
Superman: *chuckles* Fart.
~ • ~ • ~ •
I mean if Clark can canonically single out Bruce’s heartbeat while flying over earth, I think he can hear him say “Fart”.