not a ghost of a chance

I'm not joking, I'm serious.

to not be upt to scratch

Not a hair of her head was hurt

I do not doubt it.

It is not for me to pass literary judgement on the writer

to not be very steady on one’s pins

I am not interested.

not a hell of a lot

to not be worth shit/a plugged nickel/a tinker’s cuss

He's not as old as he looks.

It’s not in him

not a sausage

to not bear someone any ill will

Do not disturb!

not a scrap

to not breathe a word

Not ample enough: the actress has to wear a butt prothesis

not a sign of

I do not know how to thank you.

not the least inkling

to not breathe easy

He's not too bright.

I'm not antisocial.

not a snowball’s chance in hell