1.The ear, or its lobe. (Scot. & Prov. Eng.)
2.That which projects like an ear, esp. that by which anything is supported, carried, or grasped, or to which a support is fastened; an ear; as, the lugs of a kettle; the lugs of a founder's flask; the lug (handle) of a jug.
3.(Mach.) A projecting piece to which anything, as a rod, is attached, or against which anything, as a wedge or key, bears, or through which a bolt passes, etc.
4.(Harness) The leather loop or ear by which a shaft is held up.
6.A man; sometimes implying clumsiness. (slang)