Union of the Hideously and Improbably Deformed, an organization founded by the wife on an MP in the mid 20th century. Many members, including Joelle, wear face veils; they also carry membership cards. Marathe pretends to be a member in order to disguise his identity when he goes undercover as a Swiss resident of Ennet House. In the time before the novel is set Mario was approached to be a member, but Hal vehemently opposed this and Mario did not join.
U.H.I.D. Term Timeline in Infinite Jest
The timeline below shows where the term U.H.I.D. appears in Infinite Jest. The colored dots and icons indicate which themes are associated with that appearance.
...member of the Union of the Hideously and Improbably Deformed, and mentions the similarities between U.H.I.D. and AA. It is revealed that the person Joelle is talking to is Don Gately.... (full context)