crude and offensive in a sexual way : she began to gyrate to the music and sing a lewd song.
ORIGIN Old English lǣwede, of unknown origin. The original sense was [belonging to the laity] ; in Middle English , [belonging to the common people, vulgar,] and later [worthless, vile, evil,] leading to the current sense.
1 a lewd old man lecherous, lustful, licentious, lascivious, dirty, prurient, salacious, lubricious, libidinous; debauched, depraved, degenerate, decadent, dissipated, dissolute, perverted, wanton; formal concupiscent; archaic lickerish. antonym chaste.
2 a lewd song vulgar, crude, smutty, dirty, filthy, obscene, pornographic, coarse, off-color, unseemly, indecent, salacious; rude, racy, risqué, naughty, bawdy, ribald; informal blue, raunchy, X-rated, XXX, porno; euphemistic adult. antonym clean.
Obscene, wicked, vulgar, or even ignorant.
The usual meaning is vulgar (coarse, gross, common or offensive)
sick, perverted, disgusting, you get the points.