You had accidentally mentioned one of his features as a lighthearted joke, but Ron took it to heart - he thought of it as a genuine insult. Usually, he was rather loud whenever the four of you talked, but now, he was just slumped on the couch, watching you, Harry and Hermione laugh without him, a barely noticeable grumpy pout in his lips and a subconscious glare staring at your back.