Meaning of yassum in English:

yassum

Pronunciation /ˈjas(ə)m/

adverb

informal US
  • Used to express assent or agreement when replying to a woman: ‘yes, ma'am’.

    Chiefly in representations of African-American speech. Now sometimes used to highlight offensive expectations or stereotypes of black servility.

Origin

Late 19th century; earliest use found in Puck (New York). Representing an African-American pronunciation of yes, ma'am.