The crusty secretions that appear when a vagina has not been cleaned for a long time.
Oh, Laura - get something done about that Nuthatch now!
2 more definitions
Crazy to the extreme.
Dude, after you punched that cop the whole scene got nuthatch!
A nasty female, especially one with a loud shit talking mouth, that will pretty much fuck anything. A nuthatch probably won't care what you do to her because there's a good chance she's on something. Nuthatches like to hang out in trailer parks, bars, strip clubs, walmart, and the liquor store. They can usually be found with some dillhole or another and/or in jail.
Look over there at that nasty nuthatch bitch looking at my man...good luck I can smell her rotten cooter from here!