Definition: (textspeak) A Kongish codemixing term that refers to a person who has never been in a relationship before. I.e. Available = 0.Usage: E.g. Nei dou year 4 lah, ng hai lum ju a0 grad har wah. （你都Year 4啦，唔係諗住A0 grad吓話。）Reference: https://www.hk01.com/article/283411?utm_source=01appshare&utm_medium=referral
