A camel’s fart is neither on the earth or in the sky. (Applied to something in one’s discourse absurd or incongruous)
-A Collection of Proverbs in the Persian and Hindoostanee Languages, 1824, Thomas Roebuck
One night at the campfire I elicited a long drovers discourse on the difference between voiced and unvoiced camel flatulence, Dzarta and Faswa, but we never got to the generic word Nafkha, which Lane gives when attached to its definite article to mean, The Blast of a Horn on the Day of Resurrection.