Prompt: (moriuh) platonic Erica/Derek + "Get in loser, we're going shopping!" erica yells to whoever (Isaac, Boyd, idc) and Derek doesn't get the reference.
"You can't just-" Derek begins, already exasperated, "Erica, you can't just call your packmates losers."
Erica gives him a quizzical look before bursting into a loud, uproarious laugh, tossing her head back and bearing all her teeth. Issac is opening the back door and he's throughly confused, and Derek only shrugs in response.
"Derek's never seen Mean Girls," Erica tells Issac, still grinning like a maniac. Issac cracks a smile in return.
"Seriously?" Issac drawls out, leaning back into his seat, "I mean, I guess we shouldn't be surprised?" Erica moves a stray hand to fondly rub the back of Derek's head, though he shakes her off quickly.
"It's adorable," she adds. "He's like a martian." Derek furrows his brow as Issac snorts out a laugh. He turns to Erica, trying to give her a glare.
"Do you want a ride home or not?" he asks. She clicks her tongue and crosses her arms.
"I just said we're going shopping." she counters. Derek gives a heavy sigh.