0T

0 (ling⁴) +‎ T (ti¹), near-homophone of 檸 / 柠 (ning⁴, “lemon”) + English tea.

0T

1. (Hong Kong Cantonese, cha chaan teng jargon) lemon tea

   Synonym: 檸茶 / 柠茶 (níngchá)

   • 2006 October 12, 莊志聰, quoting 蔡坤明, “義務培訓失業人士 茶餐廳為飲食業添生力軍”, in CSR脈搏 [CSR Pulse]‎^[1], volume 4, page 10:

     例如凍檸檬茶，要寫成『冬0T』，你要全部記得住，寫得快，水吧又要明白，一點也不易！」 [Literary Cantonese, trad.]
     例如冻柠檬茶，要写成『冬0T』，你要全部记得住，写得快，水吧又要明白，一点也不易！」 [Literary Cantonese, simp.]

     lai⁶ jyu⁴ dung³ ning⁴ mung¹ caa⁴, jiu³ se² sing⁴ ‘dung³ 0T’, nei⁵ jiu³ cyun⁴ bou⁶ gei³ dak¹ zyu⁶, se² dak¹ faai³, seoi² baa¹ jau⁶ jiu³ ming⁴ baak⁶, jat¹ dim² jaa⁵ bat¹ ji⁶!” [Jyutping]

     For example, iced lemon tea needs to be written as "冬0T". You need to be able to remember it and write it quickly, and the drinks counter has to understand it. It's not easy at all!