Here are 10 popular Gen Z slang terms and idioms that are increasingly showing up in bestselling novels, especially those targeting younger audiences or written in contemporary, voice-driven styles:

🔥 Gen Z Slang & Idioms in Fiction:
Rizz
Charisma or flirting skill. “He’s got mad rizz.”

Delulu
Delusional in a playful way. “She’s delulu if she thinks he’s texting back.”

Main Character Energy
Acting like the protagonist of life. “She walked in like she owned the room—main character energy.”

No Cap
No lie / being honest. “That party was wild, no cap.”

Mid
Mediocre or underwhelming. “That sequel was so mid.”

Bussin’
Extremely good, often food. “This ramen is bussin’.”

Ghosted
Suddenly cutting off communication. “He ghosted me after two dates.”

Low-Key / High-Key
Subtle vs. obvious feelings. “I low-key miss her.” / “I high-key want to quit.”

Living Rent-Free
Something stuck in your head. “That scene is living rent-free in my brain.”

Sheesh
Expression of disbelief or admiration. “Sheesh, that glow-up!”

These terms often appear in dialogue-heavy scenes, especially in romance, YA, or contemporary fiction where characters reflect digital-native culture and social media influence.

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