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(noun, informal) Pronunciation: ssip-LINT, sib-LINT, or ssip-LIND 1. A sibling; one's brother or sister. 2. (plural: siblants) Collective term for one's siblings, typically used with casual indifference or mild affection. Etymology: Corrupted phonetic mutation of "sibling," influenced by the linguistic term "sibilant" (hissing speech sounds).
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