Term used by military member to refer to their spouse. Household 6 runs things at home not only everyday but also while their spouse is away during deployments, TDYs, and training. Often raising the couples children alone, handling PCSes alone, and anything where a POA is needed for their spouse. Name originated in two parts, Household for where the spouse spends most of their time, and 6 is a designation for a commander of a Company/Troop, Battalion/Squadron, Brigade/Regiment, Division or Corps.
household ex is either (1) when your parents loved your partner so much that they decided to adopt after the breakups or (2) an ex boyfriend that still hangs out with the ex girlfriends family and vice versa