成日 (seng4 jat6) — whole day; all day long. Mandarin: 整天 in Cantonese

sengˎ₄成jatˍ₆日

Mandarin Pinyin: cheng2 ri4

Meaning of 成日

nounwhole day; all day long. Mandarin: 整天

nounall the time; always; constantly; frequently; often　Mandarin: 常常

noun(adverb) always

唔知點解呢排成日都頭痛呀。

I don't know why I've been getting so many headaches lately.

你成日食嘢唔做嘢；搏炒係咪?

You're forever eating and not doing work; are you trying to get fired?

呢排我成日都睇電視

Recently I've been watching tv all day.

個仔成日去賭錢，做亞媽嘅都好激氣

As a mother, she is very upset with her son gambling.

佢成日喺度寫埋晒啲無聊嘢﹐我都費事睇。

He writes so much nonsense that I don't even bother reading it.

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