(vulgar) Motherfucker (generic term of abuse). / (literally, vulgar) One who engages in incestuous sex with their sibling.

plural of sibling fucker

A half sibling having the same mother but a different father.

Synonym of blood sister / Synonym of blood brother

Alternative form of sibling-in-law

A village and civil parish in Braintree district, Essex, England (OS grid ref TL7834).

Alternative form of godsibling

plural of sibling rivalry

Competition or animosity between siblings in one family.

(rare) One's spouse's sibling's spouse; either of two (or more) people who marry siblings, from the perspective of the other.