Definition of POSSLQ in English:

POSSLQ

abbreviation

informal, dated US
  • A person of the opposite sex with whom one lives as part of an established unmarried couple.

    spouse, husband, wife, mate, consort

Pronunciation

POSSLQ

/ˈpäs(ə)lˌkyo͞o/ /ˈpɑs(ə)lˌkju/

Origin

1970s short for person of the opposite sex sharing living quarters; apparently coined by a member of the US Census Bureau but never officially adopted.