A long curse uttered by an Orc in The Lord of the Rings, book III, chapter 3. Quite clearly, Tolkien first looked for a distasteful sound effect, and only later tried to ascribe it a meaning. Several interpretations of his are known to exist; three have been published to this day, in:

• The Peoples of Middle-earth p. 83: Uglúk to the cesspool, sha! the dungfilth; the great Saruman fool, skai!
• Vinyar Tengwar n° 26 p. 16: Uglúk to the dung-pit with stinking Saruman-filth — pig-guts gah!
• Parma Eldalamberon n° 17 p. 78-79: Uglúk to torture (chamber) with stinking Saruman-filth. Dung heap. Skai!

We let those of our readers interested in such matters assess the most convenient choice as well as the appropriate speech register. Tolkien’s own opinion on Black Speech (among other things) is known from this excerpt of Words, Phrases and Passages in Various Tongues in The Lord of the Rings, published in Parma Eldalamberon n° 17, p. 11-12 :

I have tried to play fair linguistically, and it is meant to have a meaning not be a mere casual group of nasty noises, though an accurate transcription would even nowadays only be printable in the higher and artistically more advanced form of literature. According to my taste such things are best left to Orcs, ancient and modern.

The text is transcribed in tengwar or “letters of Fëanor” according to the general use of the Third Age created by Tolkien, in its adaptation to the Black Speech illustrated by the One Ring inscription. We made use of Johan Winge’s typeface Tengwar Annatar Italic.  Open this mode in Glaemscribe