late 14c., "containing or resembling the substance earth," from earth (n.) + -y (2). Of tastes, smells, etc., from 1550s. Figurative sense of "coarse, unrefined" is from 1590s. Related: Earthiness.
an earthy sense of humor
earthy smells of new-mown grass
the earthy taste of warm milk fresh from the cow
an earthy enjoyment of life
only a little earthy bank separates me from the edge of the ocean
it had an earthy smell
her earthy common sense