Definition of "twattishness"

And it's a sort of proof of Johan's twattishness that he actually does leave her.

2010, Stephanie Calman, How Not to Murder Your Husband

Luca was wary of Tav getting away with too much twattishness, because he had a lot of it floating around, and maybe some people liked that whole knobhead dominant guy thing, but not Luca.

2015, Matthew J. Metzger, The Italian Word for Kisses, page 193

Is it me, or is that message total presumptuous twattishness?

2015, Ayisha Malik, Sofia Khan is Not Obliged