Las·civ·i·ous

(Of a person, manner, or gesture) feeling or revealing an overt and often offensive sexual desire.

In this sense "lascivious" is similar in meaning to "lewd", "indecent", "lecherous", "unchaste", "licentious" or "libidinous".

From late Middle English: from late Latin lasciviosus, from Latin lascivia ‘lustfulness’, from lascivus ‘lustful, wanton’.