Used in casual or informal contexts, often among youth or when affectionately referring to a sibling. At the reunion, I introduced Jamie as my sib.
Pro Tip 2/3
Gender Neutral
'Sib' is a non-gender-specific term, useful when you do not want to specify the brother or sister gender. My sib will join us later; they are always late.
Pro Tip 3/3
Informal Introductions
Appropriate for informal settings when introducing your sibling without formal titles. Hey, this is Alex, my sib.