Disclaimer: Don't own Sam, Dean, or anyone from DC Comics. But I'm okay with that. *Sniffle*

Spoilers: Takes place a day after the end of "Bad Day At Black Rock"

Language warning: Some bad words. Hey, they're big boys, what do you want?
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World's Finest

Driving down the road, heading towards yet another hunt. Sam's quiet. Dean steals a look over at him while they wait at a stop sign.

Sam's too quiet.

Time to stir things up.

"Sam?"

"Hm?"

"You okay? You're arm's not hurting too much?"

"It's sore, but I'll be alright."

"So then why are you so fucking quiet? You're usually at Full Bitch Strength right about now." Dean launches into a high-pitched whine: "'Dean, slow down!' 'Dean, can we PLEASE listen to another tape?!' 'Dean, you just sped past a cop!'" Goes back to his own voice: "So what's up?"

"Other than the fact that I'm trapped in a car with a total asshole like you, nothing much", Sam sneers. A pause. Sam gets that sweet self-conscious "I've got NO idea how good-looking I am" grin on his face. "It's stupid."

"What's stupid?"

"What I was just thinking about. It's stupid and you'll laugh."

"No, I won't."

"You will. You'll laugh and we'll wreck and I'll never hear the end of it."

"Sammy, whatever it is I will NOT laugh." Dean pulls over into the gravel at the side of the road. Turns and looks over at Sam. "Now spill."

Sam sighs. "That whole 'I'm Batman' bit from yesterday..."

Dean grins. "Yeah, I was pretty damn cool, wasn't I? What about it?"

"You DO realize that if you're Batman…" Sam looks over at him through his bangs, "that makes me Robin."

Dean stares. Blinks once. Looks Sam up and down.

"No it does NOT!"

'''fraid it does, bro."

"You've been smacked in the face once too often."

"Hey, YOU'RE the one that wants to run around dressed like a flying mouse, not me."

"You are so NOT Robin." Dean starts the Impala up, suddenly cuts the engine. Turns and gives Sam a wicked grin. "No. You're much more like someone else Batman hangs with."

"Nightwing?"

"Nope."

Sam thinks, brightens. "Superman?"

Dean snorts in derision. "Since you're obviously not bulletproof, that's another no."

"Then who?"

Dean starts the car, pulls back out onto the road. Gives Sam another evil smile, waggles his eyebrows, and says one word:

"Batgirl." Stomps on the gas, peels out.

Sam's jaw drops.

"Batjerk."

"Batbitch."