not one jot or tittle

not to have heard a dickybird of someone

I am not going to take that.

I do not wish to be a burden on you.

Do not be taken in!

not particularly

not to have heard a peep of someone

He is not at his best

not quite kosher

He is not getting along well.

not so hot

to not have it all together

It’s not what you say, but how you say it

If I am not mistaken.

not so/too dusty

to not have much kick

not that I know of

I am not feeling very well.

to not have seen hide nor hair of someone

It is not selfish to think for oneself. A man who does not think for himself does not think at all.

I do not care a fig for it.

Not for the life of me!

not the faintest hope

to not have the balls

I am not young anymore.