troff = T = troglodyte mode

troglodyte n.

[Commodore] 1. A hacker who never leaves his cubicle. The term `gnoll' (from Dungeons & Dragons) is also reported. 2. A curmudgeon attached to an obsolescent computing environment. The combination `ITS troglodyte' was flung around some during the Usenet and email wringle-wrangle attending the 2.x.x revision of the Jargon File; at least one of the people it was intended to describe adopted it with pride.

--Jargon File, autonoded by rescdsk.