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1.
to be in the best friendship anyone could ever ask for
Hilary and Austen are in a bestship.
by exil3 August 25, 2010
 
2.
a guy best friend, not a RELATIONship but it's even better.
also, if you have a really bad relationship you can call it a
relationSHIT.
"are alex & travis dating?"
"no, they just have a really great bestship"
"yeah, i'm really jealous. wish i could have something like that"
by alexandra lillian zappone January 11, 2009