I agree with durkin, commom :P
That's wrong! It's spelled backstabbah, or with more h's on the end. (Backstabbahhh) If you want to put it in another form you could say 'da backstabbah'. 'da backstabbahs xxx' looks weird so just type 'da backstabbas xxx' like in:
'da backstabbas daggah in your back makes you staggah.'
if you don't believe it you're probably no hilla, cause they know how to prononciate it/spell it.
I believe you spell it 'Backstabber'