1. The best laid plans of mice and men oft go awry

2. Don’t cut off your nose to spite your face

3. A dead ringer

4. Hit the nail on the head

5. Bee in your bonnet

6. Don’t look a gift horse in the mouth

7. Eat humble pie

8. A friend in need is a friend indeed

9. Get one’s foot in the door

10. Give the devil his due

11. Go Dutch

12. In mint condition

13. The leopard doesn’t change its spots

14. Nip it in the bud

15. Get your nose out of joint

16. Play second fiddle

17. The road to hell is paved with good intention

18. Rome wasn’t built in a day

19. To see the writing on the wall

20. A stitch in time saves nine

21. To swallow something hook, line and sinker

23. To take someone under one’s wing

24. There’s more than one way to skin a cat

25. Variety is the spice of life

26. Necessity is the mother of invention

27. What makes someone tick

28. When in Rome, do as the Romans do

29. Wear out one’s welcome

30. With no strings attached

31. To zero in on something

32. It’s down to the wire

33. Take it with a grain of salt

34. Put it on the back burner

35. He jumped on the bandwagon

36. He couldn’t make heads or tails of it

37. He made his bed. Now he has to lie in it.

38. Don’t throw the baby out with the bathwater.

39. He left me holding the bag.

40. He drew a line in the sand.

41. Keep a stiff upper lip

42. It was his Achilles’ heel

43. She cried crocodile tears

44. I’ve got egg all over my face.