mug · noun, verb, adjective1
Early 16th century (originally Scots and northern English, denoting "earthenware, pot, jug"), of unknown origin, perhaps from North Germanic (compare Swedish mugg (“mug, jug”), Norwegian mugge (“pitcher, open can for warm drinks”), Danish mugge), or Low German mokke, mukke (“mug”), German Low German Muck (“drinking cup”), Dutch mok (“mug”), also of unknown origin. Perhaps related to Old English muga (“stack”) and Old Norse múgr (“mass, heap (of corn)”). Compare also Middle English mug, mog (“a measure of salt”).
mug · noun2
Informal variant of motherfucker.
MUG · proper noun3
Abbreviation.
Etymology from Wiktionary, CC BY-SA 4.0.