(proscribed) Alternative form of as if there were no tomorrow

Success will not be achieved without hard work and struggle.

(idiomatic) After a plan against an enemy is drafted, there will be unexpected elements from the opposition that will call for improvisation.

It is important to do something immediately

Alternative form of it's an ill wind that blows nobody any good

Completely devoid of cultural or educational value. / Located outside the traditional taste hierarchy, blending highbrow, middlebrow, and lowbrow.

Used other than figuratively or idiomatically: see yes, and, no. / An answer in reply to a yes-no question, indicating there is no simple "yes" or "no" answer

(ethics, medicine) To perform no actions which will be injurious or in any way unfavorable to another person, regardless of whether one does anything of positive benefit for that other person.

(US, colloquial) Definitely not; no way.

The logical fallacy of attempting to retain an unreasoned assertion by excluding the case given in a counterexample, as in: "No Scotsman puts sugar on his porridge." "I am Scottish, and I put sugar on my porridge." "Well, no true Scotsman puts sugar on his porridge."