say it: kuhm
cum is a noun meaning "the thick white fluid containing spermatozoa that is ejaculated by the male genital tract". It carries one recorded sense.
the thick white fluid containing spermatozoa that is ejaculated by the male genital tract
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 cum 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.