A Tulchan (from the Scottish Gaelic, tulachan) was in Scotland a man appointed as bishop after the Reformation, who was a bishop in name only and whose revenue was drawn by his patron. The term originally referred to a calfskin stuffed with straw, and presented to a cow, as if living to induce her to give milk.
Mr. Gladstone during his electioneering raid into Midlothian, in November, 1879 explained the meaning of "tulchan", which he spelt "tulcan":
Jamieson writes the word "tulchane", and cites the phrase, "a tulchane bishop", as the designation of one who received the episcopate on condition of signing the temporalities to a secular person. One of them, Robert Montgomery (before 1550–1609), was prosecuted by the religious reformer Andrew Melville (1545 – 1622). In some parts of Scotland, the people say a "tourkin calf" instead of a "tulcan calf". Jamieson further states:
In other words, a "tulchan" can also be a living animal, and the usage is of one who gains profit by pretending to be someone, or something else.