Lug (Noun)
1624, "handle of a pitcher," from lugge (Scot.) "earflap of a cap, ear" (1495; in 19c. Scotland this was the only word for "ear"), probably from Scand. (cf. Swed. lugg "forelock," Norw. lugg "tuft of hair"). The connecting notion is "something that can be gripped and pulled." Applied 19c. to mechanical objects that can be grabbed or gripped. Meaning "stupid fellow" is from 1924; that of "lout, sponger" is 1931, Amer.Eng.