Klingon divorce
From Memory Alpha, the free Star Trek reference.
A Klingon divorce a ceremony which dissolves a marriage.
The ceremony is much less elaborate than a Klingon wedding. The spouse seeking divorce backhands their partner, looks at him or her, and says “N'Gos tlhogh cha!” (Our marriage is done!). The spouse finishes it by spitting on his or her partner.
Grilka performed this ceremony to divorce Quark. (DS9: "The House of Quark")
