"You canker blossom!" 3 Shakespearean Insults
1610s, "small sweet cake consisting largely of ground almonds," from French macaron (16c.), from dialectal Italian maccarone (see macaroni). French meaning said to have been invented 1552 by Rabelais. The -oon ending was conventional in 15c.-17c. English to add emphasis to borrowings of French nouns ending in stressed -on.