2. Referring to a fake / off-brand item, usually a boot-leg
3. Referring to something broken / not working as intended
"Did you watch pvc's last stream?" "yeah it was pretty scuffed"
"Have you seen Sarah's new shoes?" "yeah they're scuffed"
"Is your phone broken again?" "yeah it's fucking scuffed man, I need a new one"
EBK stands for "Elite Ball Knowledge." 1 In internet slang, "ball knowledge" originally referred to a deep understanding of football/soccer or basketball, but it has evolved into a broader term for having a highly sophisticated, deep, or niche understanding of any specific topic (such as music, movies, or subcultures).
Person A: "That scene was a direct homage to an unreleased 1982 Japanese indie film."
Person B: "Wow, EBK."