Definitions by zennanie
sibler
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.