What is "tui"

n. A New Zealand honeyeater, (taxlink Prosthemadera novaeseelandiae species noshow=1)

The tui (Prosthemadera novaeseelandiae) is an endemic passerine bird of New Zealand. It is one of the largest members of the diverse honeyeater family. The name tui is from the Māori name tūī and is the species' formal common name. The plural is tui in modern English, or ngā tūī in Māori usage; some speakers still use the '-s' suffix to produce the Anglicised form tuis to indicate plurality, but this practice is becoming less common. The early European colonists called it the parson bird, but, as with many New Zealand birds, the Maori name tui is now the common name and the English term is archaic.

The German modernist theatre practitioner Bertolt Brecht invented the term and used it in a range of critical and creative projects, including the material that he developed in the mid-1930s for his so-called Tui-Novel—an unfinished satire on intellectuals in the German Empire and Weimar Republic—and his epic comedy from the early 1950s, Turandot or the Whitewashers' Congress. The word is a neologism that results from the acronym of a word play on "intellectual" ("Tellekt-Ual-In").

According to Mark Clark:

Brecht routinely referred to the members of the Frankfurt School, particularly Theodor Adorno, as "Tuis". The corresponding term "Tuism" describes the theory and practice of the Tui-intellectual.