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Jyutping lou5 zi2
Pinyin lǎo zi

Definitions (CC-CEDICT)
  1. father
  2. daddy
  3. "I, your father" (in anger, or out of contempt)
  4. I (used arrogantly or jocularly)
Definitions (Wiktionary)
  1. pron, colloquial, humorous, sometimes
    I; me
    (syn.) 爺, 爷
    • 老子才不怕老闆呢。
      老子才不怕老板呢。
      lǎo zi cái bù pà lǎo bǎn ne .
      I'm not afraid of the boss.
    • 娘什麼?老子都不老子了。
      娘什么?老子都不老子了。
      niáng shèn me ? lǎo zi dōu bù lǎo zi le .
      Mom what? My dad can't give control over me now. (an example showing two different meanings of this word)
  2. noun, slang
    father; old man
    • 娘什麼?老子都不老子了。
      娘什么?老子都不老子了。
      niáng shèn me ? lǎo zi dōu bù lǎo zi le .
      Mom what? My dad can't give control over me now. (an example showing two different meanings of this word)
  3. noun
    old man
  4. noun, dated, regional
    son; young man (i.e. a mother scolding her son)
    • 最奇怪的是昨天街上的那個女人,打他兒子,嘴裏説道:“老子呀!我要咬你幾口才出氣!”他眼睛卻看着我。
      最奇怪的是昨天街上的那个女人,打他儿子,嘴里说道:“老子呀!我要咬你几口才出气!”他眼睛却看着我。
      zuì qí guài de shì zuó tiān jiē shàng de nà ge nǚ rén , dǎ tā ér zǐ , zuǐ lǐ shuō dào : “ lǎo zi ya ! wǒ yào yǎo nǐ jǐ kǒu cái chū qì ! ” tā yǎn jīng què kàn zhe wǒ .
      The strangest was a woman on the street yesterday. She was hitting her son. From her mouth, I heard her say, "Young man! I'd like to take a few bites out of you just to vent my anger!" Yet, her eyes were fixed on me.

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Jyutping lou5 zi2
Pinyin lǎo zǐ

Definitions (CC-CEDICT)
  1. Laozi or Lao-tze (c. 500 BC), Chinese philosopher, the founder of Taoism
  2. the sacred book of Daoism, 道德經|道德经[Dao4 de2 jing1] by Laozi
Definitions (粵典–words.hk)
  1. 名詞、專名
    歷史​人物​;​春秋​時​代​嘅​哲​學​家​,​後​人​奉​為​道家​同​道教​始祖​,​神格化​為​「​太上老君​」
    Lao Tzu; Laozi
  2. 名詞、專名
    書名​,​即​《​道德​經​》​,​相傳​係​老子​所著
    Tao Te Ching
  3. x
Definitions (Wiktionary)
  1. name
    Laozi (604–531 BCE), a Chinese philosopher, and founder of Taoism
  2. name
    Laozi (also called Tao Te Ching, a book of philosophy supposedly written by Laozi)
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    道教是用老子的教导创立的,他是公元前六零四年在现代的河南省出生的圣贤。
    道教是用老子的教導創立的,他是公元前六零四年在現代的河南省出生的聖賢。
    dào jiào shì yòng lǎo zǐ de jiào dǎo chuàng lì de , tā shì gōng yuán qián liù líng sì nián zài xiàn dài de hé nán shěng chū shēng de shèng xián 。
    • Taoism was founded on the teachings of Laozi, a sage born in 604 B.C. in present-day Henan Province.
Examples (Wiktionary)
  1. Mandarin
    给老子爬!
    給老子爬!
    gěi lǎo zi pá !
    • Get out of my face!
  2. Mandarin
    李开这人太坏,太霸道,惹急了老子找人把他办了。
    李開這人太壞,太霸道,惹急了老子找人把他辦了。
    lǐ kāi zhè rén tài huài , tài bà dào , rě jí le lǎo zi zhǎo rén bǎ tā bàn le .
    • X
  3. Mandarin
    “假病,老子给你医!”
    “假病,老子給你醫!”
    “ jiǎ bìng , lǎo zi gěi nǐ yī ! ”
    • You fake sickness; I'll give you the cure.
  4. Mandarin
    老子才不怕老板呢。
    老子才不怕老闆呢。
    lǎo zi cái bù pà lǎo bǎn ne .
    • I'm not afraid of the boss.
  5. Mandarin
    娘什么?老子都不老子了。
    娘什麼?老子都不老子了。
    niáng shèn me ? lǎo zi dōu bù lǎo zi le .
    • Mom what? My dad can't give control over me now. (an example showing two different meanings of this word)