Five Things Chuck ate in the Pegasus galaxy that he can't pronounce
Chuck only goes offworld once. There's a trading mission that needs someone technically savvy and Zelenka and his team are too busy extracting McKay from a Wraith dart. Weir looks out from the door of her office with a blank look that says "Who here is smart?" and the first person she looks at is Chuck. She flaps her hand at him and he grins and runs to suit up, all the while bragging to his friend in anthropology over the radio that he'll be going offworld and doesn't that just make you sick with jealousy?
It turns out that offworld missions aren't all they're cracked up to be. Chuck has had the cultural appreciation lecture the same as everyone, but it turns out brokering a successful trade negotiation involves things like standing in the back of the room, apologizing for accidentally proposing to the chief's daughter through unintended eye contact and eating the food.
They pass him a tray cut into five sections and tell him it's the traditional meal of peaceful contact between two people and then rattle off a string of words that sounds to Chuck like someone speaking Welsh through a mouthful of cotton with an extra click at the end for emphasis and a series of structured gestures that Chuck doesn't try to imitate for fear of smacking Stevens in the face instead.
Chuck decides to call his meal Red, Orange, Yellow, Green and Blue, because that's what they are and brightly so. He hesitantly samples Red, eyes widening when it turns out the only thing he can think to describe it is Red, then takes a quick bite of each of the other four. He pushes the tray to Stevens with a hissed "Taste the rainbow" then scurries outside where he can let his laughter bubble up without endangering the peace.
When they return to Atlantis, he informs Weir that he's perfectly happy with his current responsibilities and if she ever needs an extra body on an away team, he knows someone in anthropology who actually likes freeze pops and would jump at the chance.