stocky (adj.) Look up stocky at Dictionary.com
c.1400, "made of wood," from stock (n.1). Of plants, "of stout and sturdy growth" (not weedy) it is recorded from 1620s. Of persons, "thick-set," 1670s, suggestive of tree trunks, but compare also stock in sense of "trunk of the human body" (late 14c.).