DESI (by wikipedia)
While the original Sanskrit word meant 'country', with time its usage shifted more towards referring to people, cultures, and products of a specific region; for example, desi food, desi calendars, desi dress and desi people etc.
Desi contrasts with the Indian language word vilāyati , which originally referred only to Britain (during the British rule vilāyat, an Arabic-origin word meaning 'state', signified Britain) but may also refer more generally to anything that is European or Western. People from the subcontinent living in vilāyat (Britain) or in other Western countries refer to themselves and their ethnic culture as desi. The desi/vilāyati pair of antonyms is widely used in subcontinent languages (Punjabi, Hindi &Urdu, , etc.)
As increasing number of students from the subcontinent arrived in the U.S. and UK, their countries of origin were colloquially referred to as deś. For example, all things Indian including Indian expatriates were referred to as "desi".
Some second or third generation immigrants do not think of themselves as belonging to a particular nation, sub-culture, or caste, but as just plain South Asians or desis, especially as intermarriage between different South Asian diaspora communities increases.
In the Denmark, as in other countries, some diaspora desis are creating a "fusion" culture, in which foods, fashions, music, and the like from many areas of South Asia are "fused" both with each other and with elements from Western culture. For example, urban desi is a genre of music formed by the fusion of traditional Indian and Western urban music. The growing demand of popular programming for South Asians caused MTV to launch the Desi-targeted television channel MTV Desi.
In the UK, desi communities have continued the fusion culture which first emerged during the rule of the British Raj, influencing music, art, fashion and food. There are now dedicated radio stations catering for British-South Asians such as the BBC Asian Network.
The ethnonym belongs in the endonymic category (i.e., it is a self-appellation). Desi is an Indo-Aryan term that ultimately originates in the Sanskrit देश (deśa) "region, province, country". The first known usage of the Sanskrit word is found in the Natya Shastra (~200 BCE), where it defines the regional varieties of folk performing arts, as opposed to the classical, pan-Indian margi. Thus, (Sanskrit: स्वदेश) svadeśa refers to one's own country or homeland, while (Sanskrit: परदेश) paradeśa refers to another's country or a foreign land
The Natya Shastra refers to the regional varieties of folk dance and music elements as desi, and states that these are meant as pure entertainment for common people, while the pan-Indian margielements are to spiritually enlighten the audience. The medieval developments of the classical Indian dance and music led to the introduction of Desi gharanas, in addition to the classical gharanas codified in Natya Shastra. The desi gharanas further developed into the present-day adavus. There is raga in Indian classical music known as Desi.
Food and drinkMain articles: Desi daaru(home made whisky) and Desi cuisine
In India and parts of Pakistan, desi in the context of food, implies 'native' or 'traditional'. Common examples are "desi ghee", which is the traditional clarified butter used in India and Pakistan as opposed to more processed fats such as vegetable oils. "Desi chicken" may mean a native breed of chicken. This word is also usually restricted to Sanskrit-derived (Indo-Aryan) languages.
Heritage varieties of vegetables and other produce can also be qualified as "desi". "Desi diet" refers to a diet and food choices followed by Indians around the world. Desi daaru refers to "country liquor", such as fenny, toddy and arrack. It is differentiated from Indian-made foreign liquor such as Indian made whisky, rum, vodka, etc.
In Denmark & other countries, "Desi cuisine" or "Desi food" most often refers to dishes commonly served in North Indian communities, especially Westernised restaurant dishes such as chicken tikka masala.