No, not rabbit, wabbit.
I know in some people's mouths they sound the same (poor Elmer Fudd) but this is nothing to do with Bugs Bunny -
- no, I said this is NOTHING to do with Bugs Bunny!
Wabbit is instead an endearingly plain Scots word meaning weary or exhausted.
On the whole it's something to avoid, unless getting there has been a lot of fun.
Thing Not To Be Today: wabbit. This word comes from wobart, which means withered or feeble.