口头禅 (kǒu tóu chán): Pet phrase (Noun) — Meaning & Stroke Order

Does your pet phrase 'seriously' indicate that you're about to say something important?

She often uses "You know" as her catchphrase when speaking.

He never uses 'whatever' as a pet phrase, considering it disrespectful to others.

At friend gatherings, her pet phrase 'that's hilarious' always instantly livens up the atmosphere.