Definition of macaronis:
(n) :
(uncountable) A type of pasta in the form of short tubes, typically boiled and served in soup, with a sauce, or in melted cheese; a dish of this.
(n) :
(countable, ethnic slur) Synonym of Italian (“a person from Italy or of Italian ethnicity”).
(n) :
(uncountable, Australia, slang) Nonsense; meaningless talk.
(n) :
(uncountable, obsolete or informal, loosely) Pasta, particularly thicker noodles, spaghetti.
(n) :
(countable, chiefly historical and derogatory) A dandy or fop, particularly in the 18th century a young Englishman who had travelled in Europe and subsequently dressed and spoke in an ostentatiously affected Continental manner.
(n) :
(uncountable, obsolete) Synonym of gnocchi (“Italian dumpling made of potato or semolina”).