look up any word, like plopping:
 
1.
A sibster is a person who acts like everyone's sister. A sibster has lots of friends and pals, because they are very friendly. A sibster is like a sister but is of no blood relation.
"Nat's my sibster, ya know?"
by verydifferentname July 12, 2006

Words related to sibster

friend pal sister family sibling sib
 
2.
a sibling who is a sister
I have three wonderful sibsters.
by Qith March 28, 2009
 
3.
a sibling who is a sister
I have three wonderful sibsters.
by Qith March 28, 2009