Daffy
来自Big Physics
late 19th century: from northern English dialect daff ‘simpleton’ + -y1; perhaps related to daft.
wiktionary
From daff + -y.
daffy (plural daffies)
An allusion to an old medicine known as Daffy's Elixir.
etymonline
daffy (adj.)
"simple, wanting in intelligence," also "crazy, mad," 1884, perhaps from daft (adj.), or from obsolete daffe "a halfwit" (early 14c.; mid-13c. as a surname), which survived in 19c. in dialects, itself of uncertain origin (OED finds a proposed origin in Scandinavian words for "deaf, stupid," such as Old Norse daufr, "phonetically inadmissible"). Compare late 15c. daffish "dull-witted, spiritless." With -y (2). Related: Daffily; daffiness. The Warner Bros. cartoon character Daffy Duck debuted in 1937.
