(idiomatic, chiefly UK) not on your life, an emphatic form of no.

(idiomatic) Worth nothing or next to nothing.

Unfortunately, no; I regret that that is not so.

(cricket) The state of a player who did not bat in an innings played by his side. Abbreviated DNB.

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

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

(Of a company or organization) providing goods or services but not for the purpose of making a profit.

A not-for-profit company or organization.

(cricket, of a batsman at the end of an innings) not dismissed and having not retired. / Used other than figuratively or idiomatically: see not, out.

(emphatic) Not in the least.