Disgruntled

Raven looking out the T-Car's window during her teammate's joke cracking and conversation.

Beast Boy: "Okay, okay, I got one: Why are ducks so funny? Because they're always quackin' jokes!"
...

Starfire: "Oh, I see; It is humorous because ducks lack the large brain necessary for the telling of jokes."

Robin: "Actually, Starfire, it just wasn't humorous."

...

Raven: "Because Beast Boy lacks the large brain necessary for telling jokes."

Episode: Aftershock (Part I)