cuiloni.

Auh in cucuxquj cenca tlanauj, yn amo vel pati, yn aoc ontlaiecoa yn aoc vel i: in quenmanjan cahoaia: qujlhujaia. Titlacaoane, cujlonpole = And the sick man [who was] in sore straits, who might not recover, who could not now end [the suffering], who could now endure no more, sometimes berated [Titlacauan]. He said to him: "O Titlacauan, thou sodomite!" (central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 3 -- The Origin of the Gods, Part IV, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1978), 12.

"The cuiloni, the one who is sodomized, becomes intricately connected with the one who is sacrificed and eaten."
P. Sigal, "The Cuiloni, the Patlache, and the Abominable Sin," Hispanic American Historical Review (2005) 85 (4): 555–593.

See also the Florentine Codex, where a person might cry out angrily at one of the supreme deities by calling him a cuiloni (see attestation).
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 4, ch. 9, f. 24.

Note that the word for anus is cuilchilli.