Definitions from Wiktionary ( )

▸ noun:  A large cup for beverages, usually having a handle and used without a saucer.
▸ noun:  (slang, often derogatory) The face.
▸ noun:  (slang, derogatory) A gullible or easily-cheated person.
▸ noun:  (UK, Australia, derogatory, slang) A stupid or contemptible person.
▸ noun:  (slang) A criminal.
▸ noun:  (slang) A mug shot.
▸ verb:  (transitive, obsolete, UK) To strike in the face.
▸ verb:  (transitive) To assault for the purpose of robbery.
▸ verb:  (intransitive) To exaggerate a facial expression for communicative emphasis; to make a face, to pose, as for photographs or in a performance, in an exaggerated or affected manner.
▸ verb:  (transitive) To photograph for identification; to take a mug shot of.
▸ verb:  (UK, Australia, Singapore, slang) To learn or review a subject as much as possible in a short time; cram.
▸ adjective:  (archaic) Easily fooled, gullible.
▸ adjective:  (Bermuda, slang) Uninteresting or unpleasant.
▸ noun:  (slang, African-American Vernacular) Motherfucker (usually in similes, e.g. "like a mug" or "as a mug")

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