say it: muh-GUHF-uhn
mcguffin is a noun meaning "(film) a plot element that catches the viewers' attention or drives the plot". It carries one recorded sense.
(film) a plot element that catches the viewers' attention or drives the plot
“the McGuffin was a key element of Alfred Hitchcock's films”
film
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for mcguffin come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.