# 老牛
## Chinese
### Etymology 1
#### Pronunciation

* Mandarin
    (Pinyin): lǎoniú
    (Zhuyin): ㄌㄠˇ ㄋㄧㄡˊ
* Cantonese (Jyutping): lou$^5$ ngau$^4$
* Mandarin
** (Standard Chinese)
*** Hanyu Pinyin: lǎoniú
*** Zhuyin: ㄌㄠˇ ㄋㄧㄡˊ
*** Tongyong Pinyin: lǎonióu
*** Wade–Giles: lao$^3$-niu$^2$
*** Yale: lǎu-nyóu
*** Gwoyeu Romatzyh: laoniou
*** Palladius: лаоню (laonju)
*** Sinological IPA : /lɑʊ̯²¹⁴⁻²¹ ni̯oʊ̯³⁵/
* Cantonese
** (Standard Cantonese, Guangzhou–Hong Kong)
*** Jyutping: lou$^5$ ngau$^4$
*** Yale: lóuh ngàuh
*** Cantonese Pinyin: lou$^5$ ngau$^4$
*** Guangdong Romanization: lou$^5$ ngeo$^4$
*** Sinological IPA : /lou̯¹³ ŋɐu̯²¹/

#### Noun

老牛
* old cow; used other than figuratively or idiomatically: see 老 (lǎo),‎ 牛 (niú).

##### Derived terms

* 老牛聲／老牛声
* 老牛食嫩草

### Etymology 2

From 老 (lou$^5$) + clipping of 牛仔褲／牛仔裤 (ngau$^4$ zai$^2$ fu$^3$, “jeans”).

#### Pronunciation

* Cantonese (Jyutping): lou$^5$ ngau$^{4-2}$
* Cantonese
** (Standard Cantonese, Guangzhou–Hong Kong)
*** Jyutping: lou$^5$ ngau$^{4-2}$
*** Yale: lóuh ngáu
*** Cantonese Pinyin: lou$^5$ ngau$^{4-2}$
*** Guangdong Romanization: lou$^5$ ngeo$^{4-2}$
*** Sinological IPA : /lou̯¹³ ŋɐu̯²¹⁻³⁵/

#### Noun

老牛
* (Hong Kong Cantonese, colloquial) jeans (Classifier: 條／条 c)

##### Synonyms

| Variety | Location | Words |
| Formal (Written Standard Chinese) | Formal (Written Standard Chinese) | 牛仔褲 |
| Northeastern Mandarin | Beijing | 牛仔褲 |
| Northeastern Mandarin | Taiwan | 牛仔褲 |
| Northeastern Mandarin | Chifeng | 牛仔褲 |
| Northeastern Mandarin | Hulunbuir (Hailar) | 牛仔兒褲 |
| Northeastern Mandarin | Harbin | 牛仔褲 |
| Northeastern Mandarin | Shenyang | 牛仔褲 |
| Northeastern Mandarin | Malaysia | 牛仔褲 |
| Northeastern Mandarin | Singapore | 牛仔褲 |
| Jilu Mandarin | Tianjin | 牛仔褲 |
| Jilu Mandarin | Tangshan | 牛仔褲 |
| Jilu Mandarin | Cangzhou | 牛仔兒褲 |
| Jilu Mandarin | Baoding | 牛仔褲 |
| Jilu Mandarin | Shijiazhuang | 牛仔褲 |
| Jilu Mandarin | Jinan | 牛仔褲 |
| Jiaoliao Mandarin | Yantai (Muping) | 牛仔褲兒 |
| Jiaoliao Mandarin | Qingdao | 牛仔褲兒 |
| Central Plains Mandarin | Wanrong | 牛仔褲 |
| Central Plains Mandarin | Zhengzhou | 牛仔褲 |
| Central Plains Mandarin | Xi'an | 牛仔褲 |
| Central Plains Mandarin | Xining | 牛仔褲 |
| Central Plains Mandarin | Xuzhou | 牛仔褲 |
| Lanyin Mandarin | Yinchuan | 牛仔褲 |
| Lanyin Mandarin | Lanzhou | 牛仔褲 |
| Lanyin Mandarin | Ürümqi | 牛仔褲 |
| Southwestern Mandarin | Chengdu | 牛仔褲 |
| Southwestern Mandarin | Wuhan | 牛仔褲 |
| Southwestern Mandarin | Guiyang | 牛仔褲 |
| Southwestern Mandarin | Kunming | 牛仔褲 |
| Southwestern Mandarin | Guilin | 牛仔褲 |
| Southwestern Mandarin | Liuzhou | 牛仔褲 |
| Jianghuai Mandarin | Nanjing | 牛仔褲 |
| Jianghuai Mandarin | Yangzhou | 牛仔褲 |
| Jianghuai Mandarin | Nantong | 牛仔褲 |
| Jianghuai Mandarin | Hefei | 牛仔褲 |
| Cantonese | Guangzhou | 牛仔褲 |
| Cantonese | Hong Kong | 牛仔褲, 牛記, 老牛 |
| Cantonese | Taishan | 牛仔褲 |
| Hakka | Miaoli (N. Sixian) | 牛仔褲 |
| Hakka | Pingtung (Neipu; S. Sixian) | 牛仔褲 |
| Hakka | Hsinchu County (Zhudong; Hailu) | 牛仔褲 |
| Hakka | Taichung (Dongshi; Dabu) | 牛仔褲 |
| Hakka | Hsinchu County (Qionglin; Raoping) | 牛仔褲 |
| Hakka | Yunlin (Lunbei; Zhao'an) | 牛仔褲 |
| Huizhou | Shexian | 牛仔褲 |
| Jin | Taiyuan | 牛仔褲 |
| Jin | Xinzhou | 牛仔褲 |
| Jin | Linhe | 牛仔褲 |
| Jin | Jining | 牛仔褲 |
| Jin | Hohhot | 牛仔褲 |
| Jin | Zhangjiakou | 牛仔褲 |
| Jin | Handan | 牛仔褲 |
| Eastern Min | Fuqing | 牛囝褲 |
| Eastern Min | Matsu | 牛囝褲 |
| Southern Min | Xiamen | 牛仔褲 |
| Southern Min | Taipei (Wanhua) | 拍鐵仔褲 |
| Southern Min | Kaohsiung | 拍鐵仔褲 |
| Southern Min | Yilan | 拍鐵仔褲 |
| Southern Min | Changhua (Lukang) | 牛仔褲 |
| Southern Min | Taichung | 牛仔褲 |
| Southern Min | Taichung (Wuqi) | 牛仔褲 |
| Southern Min | Tainan | 牛仔褲, 拍鐵仔褲 |
| Southern Min | Taitung | 拍鐵仔褲 |
| Southern Min | Hsinchu | 拍鐵仔褲 |
| Southern Min | Penghu (Magong) | 拍鐵仔褲 |
| Southern Min | Singapore (Hokkien) | 牛仔褲 |
| Southern Min | Manila (Hokkien) | 牛仔褲 |
| Southern Min | Jieyang | 牛囝褲 |
| Southern Min | Haifeng | 牛仔褲 |
| Southern Min | Wenchang | 牛囝褲 |
| Southern Pinghua | Nanning (Tingzi) | 牛仔褲 |
| Wu | Shanghai | 牛仔褲 |
| Wu | Suzhou | 牛仔褲 |

### Etymology 3
#### Pronunciation

* Cantonese (Jyutping): lou$^5$ ngau$^{4-2}$
* Cantonese
** (Standard Cantonese, Guangzhou–Hong Kong)
*** Jyutping: lou$^5$ ngau$^{4-2}$
*** Yale: lóuh ngáu
*** Cantonese Pinyin: lou$^5$ ngau$^{4-2}$
*** Guangdong Romanization: lou$^5$ ngeo$^{4-2}$
*** Sinological IPA : /lou̯¹³ ŋɐu̯²¹⁻³⁵/

#### Noun

老牛
* (Hong Kong Cantonese, slang) knife for cutting beef (a common weapon among triads) (Classifier: 把 c)
** 1993, Flirting Scholar:
       ngo$^5$ zo$^2$ bin$^1$ lung$^4$, jau$^6$ bin$^1$ fu$^2$, lou$^5$ ngau$^{4-2}$ zoi$^6$ jiu$^1$ gaan$^1$, lung$^4$ tau$^4$ zoi$^6$ sam$^1$ hau$^2$, jan$^4$ dong$^2$ saat$^3$ jan$^4$, fat$^6$ dong$^2$ saat$^3$ fat$^6$! [Jyutping]
       (please add an English translation of this quotation)

##### Synonyms

* (knife for cutting beef): 牛肉刀