I will let you stay up late for this once.
for this once
idiomOn this particular occasion, to make an exception
Usually we do not allow pets in the office, but we will make an exception for this once.
Although the strict regulations forbade any deviation from the protocol, the supervisor granted a rare waiver for this once to accommodate the urgent request.
- 01
all at once
Unexpectedly; without warning; all of a sudden.
- 02
once again
Again, once more, one more time.
- 03
once and for all
Conclusively, finally, permanently.
- 04
once in a blue moon
Very rarely; very infrequently.
- 05
once in a while
Occasionally; sometimes.
- 06
once or twice
A small, indefinite number of times.