Similar words: order of the day, rule of thumb, state-of-the-art, state of the art, battle of the bulge, on the spur of the moment, the day before yesterday, days. Meaning: adv. within an indefinite time or at an unspecified future time.
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1. One of these days is none of these days. 
2. One of these days I'll get my shit together.
3. One of these days, humankind will destroy the world.
4. He's so old that he will snuff out one of these days.
5. He'll come to a bad end one of these days.
6. I'm sure your watch will turn up one of these days.
7. That wretched child I'll swing for him one of these days!
8. You're going to get into serious trouble one of these days.
9. He'll come to a sticky end one of these days if he carries on like that.
10. One of these days he'll realize what a fool he's been.
11. One of these days you'll come back and ask me to forgive you.
12. One of these days I'm going to walk right out of here and never come back.
13. One of these days I'll get this garage straight.
14. One of these days Sam is going to come up against a good old time proper door.
15. There may be good news from Washington one of these days.
16. One of these days,(http://sentencedict.com/one of these days.html) I'll clean house for him.
17. One of these days we will get lucky.
18. She'll fret herself to death one of these days.
19. You'll drive mum mad one of these days.
20. " I'll come back at dawn one of these days and get my shots. "
21. One of these days, I'm going to start in on you.
22. There's going to be an awful smash here one of these days if that's true.
23. That temper of hers will get her into trouble one of these days.
24. The electrician will come round to collect the electricity fee for the month one of these days.
25. Adam was so extreme; they really would cart him off to a padded cell one of these days.
26. If you don't start taking care of your body, you're going to have a heart attack one of these days.
27. "Never mind, " said Mrs. Hurstwood consolingly, "we'll go one of these days. "
28. If you confuse black and white any more, we'll settle with you one of these days.
29. Tom has been away for months, but he'll land up one of these days.
30. Yes, very delicious. Now I have known this cuisine. I'll try the bouillabaisse in France as I have a chance to be in France one of these days.
More similar words: order of the day, rule of thumb, state-of-the-art, state of the art, battle of the bulge, on the spur of the moment, the day before yesterday, days, nowadays, dog days, holidays, weekdays, one day, out of the wood, out of the blue, out of the woods, bank holidays, sedan, out of this world, sedate, out of the question, carry the day, these, sedated, on top of the world, speak of the devil, out of the ordinary, sedative, yesterday's newspaper, to my way of thinking.