scrumdiddlyumptious (comparative more scrumdiddlyumptious, superlative most scrumdiddlyumptious) (slang, humorous) Scrumptious; delicious.

Those new additions include scrumdiddlyumptious, arguably the best word Dahl ever created and made famous in Charlie and the Chocolate Factory. According to the OED, its official definition is "extremely scrumptious; excellent, splendid; (esp. of food) delicious."

Scrumdiddlyumptious was made famous by Dahl’s Charlie and the Chocolate Factory. The definition for the word in the new OED is “extremely scrumptious; excellent, splendid; (esp. of food) delicious.”