上口 (shàng kǒu) — smooth and easy to pronounce (of words or phrases); fluent and catchy when read aloud

Definition

Examples

• 这首诗读起来很上口。
  Zhè shǒu shī dú qǐ lái hěn shàng kǒu.
  This poem reads very smoothly.
• 这些歌词写得非常上口，我一听就记住了。
  Zhè xiē gē cí xiě dé fēi cháng shàng kǒu, wǒ yì tīng jiù jì zhù le.
  These lyrics are written very catchily; I remembered them after one listen.
• 这段绕口令不上口，我念了好几次都没念对。
  Zhè duàn rào kǒu lìng bú shàng kǒu, wǒ niàn le hǎo jǐ cì dōu méi niàn duì.
  This tongue twister isn't smooth; I've recited it several times and still haven't gotten it right.