also low down, lowdown, "vulgar," 1888, from low (adj.) + down (adv.). Earlier it meant "humble" (1540s). As a noun, 1915, from the adjective, American English.
Slang definitions & phrases for low-down
low-down
adjective
Vulgar; despicable; vile: a dirty lowdown trick(1888+)
Intense and insinuating, in the blues style: a babe with a low-down voice(1900+ Jazz musicians)