say it: nuhb
nub is a noun meaning "a small lump or protuberance". It carries 3 recorded senses.
the choicest or most essential or most vital part of some idea or experience
“the gist of the prosecutor's argument”
“the heart and soul of the Republican Party”
“the nub of the story”
Canada · United Kingdom
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 nub 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.