cross-sibling
noun 2
Definitions
noun
1
An opposite-sex sibling or parallel cousin.
Ifaluk society even forbids smoking in the presence of one's cross-siblings, because it involves movements and gestures with sexual connotations.
2
The half-sibling of one's half-sibling; a person with whom one shares a half-sibling, but no parents.
As cross-siblings we're not in any way bound to each other; our relationship is optional, we don't have to get on – we just do.
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