bosh 1
/bosh/ , n.
absurd or foolish talk; nonsense.
[ 1830-35; bos empty; popularized from its use in the novel Ayesha (1834) by British author James J. Morier (1780-1849) ]
bosh 2
/bosh/ , n. Metall.
the section of a blast furnace between the hearth and the stack, having the form of a frustum of an inverted cone. See diag. under blast furnace .
[ 1670-80; prob. böschen to slope, Böschung slope, scarp ]