chatkain
sanatanhindusikh
shastarvidiya

One also finds 'Chatka' mentioned in texts written by non-Indians.

In 1867, Ernest Trump, spoke of the term 'Chatka' in the introduction of his translation of the Adi Guru Durbar:

'A Sikh should never buy meat from a butcher, but eat only, the flesh of such animals whose head was severed by a Sikh, with one stroke of the sword; this kind of slaughtering animals, is called 'Jhatka'. Beef is not even so much as mentioned in the, Rahit-namas, as its use was altogether considered abominable. To eat of the leavings of the meal of another entails the pain, of death.'
(Western Image Of The Sikh Religion, A Source Book, edited by Darshan Singh, Pa. 143)

Akali Nihang Singhs like the elderly Akali Nihang Baba Shabdev Singh, hold that Akali Guru Nanak himself started institution of Chatka within Sikhism:

'Chatka was started by Guru Nanak. Guru Nanak cooked, venison at 'Kurukshetra' (battlefield where the great Mahabharat was fought).'
(Akali Nihang Baba Shabdev Singh, transcript of interview, 7th April 1998)