Praying for sleep, perhaps, but the right to conk out near the table?
"You better be thinking of getting us in, one of my engines is about to conk out on me," he called across.
as in conk out, 1918, coined by World War I airmen, perhaps in imitation of the sound of a stalling motor, reinforced by conk (v.) "hit on the head," originally "punch in the nose" (1821), from conk (n.), slang for "nose" (1812), perhaps from fancied resemblance to a conch (pronounced "conk") shell.
: I couldn't get over marveling at how their hair was straight and shiny like white men's hair; Ella told me this was called ''conk''
To apply a mixture sometimes containing lye to the head in order to straighten kinky hair
[1940s+ Black; probably fr Congolene, trademark of a preparation used to straighten hair, influenced by conk1]
To die; cease to operate; conk out: A year after that, a spinster aunt conked (WWI Royal Flying Corps)