dug /dʌɡ/ noun[in the plural]2 •A mammary gland on a domestic mammal with more than two breasts, mostly used to refer to the nipples of non-ruminants and non-primates.Horatio: This Lapvving runs avvay vvith the sshell on his head. Hamlet: He did complie with his Dugge before hee suck't it: […] — 1599 •(vulgar) A woman's breast or nipple.Ah! that Deceit should steale such gentle shape, And vvith a vertuous Vizor hide deepe vice. He is my sonne, I, and therein my shame, Yet from my dugges, he drew not this deceit — 1593 formsdugs