Synonyms for Low-down:

adj.

contemptible (adjective)
low, abject, mean, ignoble, scummy, base, vile, sordid, scurvy.
depressed (adjective)
low.
low (adjective)
miserable.
paltry (adjective)
contemptible.
sordid (adjective)
squalid.

n.

communication (noun)
the skinny.
low-down (noun)
funky, abject, low, emotional, miserable, contemptible, the skinny, scurvy, scummy.

Other synonyms:

ignoble, sordid. squalid. vile.