Top Definition
A way to reference your sibling -- similar to brother or sister, but gender neutral. Can also be used as a term of endearment (Hey, sibster, what's up?). The plural, "siblers," can be used as a shortened version of "brothers and sisters."
I called all four of my siblers today to see who was going home for Thanksgiving. My oldest and youngest siblers will be there, but the other two staying home.
by zennanie October 15, 2010

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