(slang) Used to indicate that the previous phrase was meant sarcastically or ironically.

And not.

Negates the meaning of the modified verb. / To no degree. / (understatement, litotes) Used to indicate the opposite or near opposite, often in a form of understatement.

Alternative letter-case form of NOT

(idiomatic) Usually; more than half the time; more likely to be the case than not to be the case.

(idiomatic) Worth nothing or next to nothing.

Any indication similar in nature to nota bene. / Something deserving of close attention or of careful notice.

(imperative) Take special note; used to add an aside or warning to a text.

(idiomatic) An apophasis used by a speaker to introduce, despite claiming not to address, a given point of discussion.

Not for the moment, though expected later. / Not quite; not exactly.