be at one with someone

One pizza with the whole works, please

one billion

one’s fingers itch

one’s gorge rises at

One can survive everything nowadays, except death, and live down anything except a good reputation.

one’s head is spinning

One should sympathise with the joy, the beauty, the colour of life. The less said about life’s sores the better.

one of many

one’s own flesh and blood

to one’s full satisfaction

one among many

to one’s heart’s content

one’s patent remedy for hangovers

one of the greatest threats to mankind

one month

to be one hell of a person

If one wants to have one’s busines well done, one must do it oneself

one night

One should look only on the good side of people

to be one jump ahead

one tenth

to be one’s first baby

on one’s own hook

of one’s own accord