粵典 (words.hk)Hong KongWord
01
殘疾人士登記證，係勞工及福利局畀殘疾人士自願登記嘅證件（量詞：張） (Registration Card for People with Disabilities; literally: white card)
名詞Examples
好多人以為「白卡」係精神病先拎得，其實唔係㗎。
hou2 do1 jan4 ji5 wai4 baak6 kaat1 hai6 zing1 san4 beng6 sin1 ling1 dak1, kei4 sat6 m4 hai6 gaa3.
Many people think that only people with mental disorders can apply for a "white card", but it is actually not the case.
02
借代精神病人或者精神失常嘅人，帶貶義 ((pejorative) used figuratively to refer to the mentally ill, or people who are perceived to be mentally unstable)
Examples
白卡佬
baak6 kaat1 lou2
mentally ill guy; crazy guy