1. She's a tough cookie / customer .

2. Informal An individual with whom one must deal: That teacher is a tough Customer.

3. Tough times never last, tough people do. Tough people stick it out.

4. Tough times never last, but tough people do.

5. Customer synonyms, Customer pronunciation, Customer translation, English dictionary definition of Customer

6. Hang tough.

7. It's tough.

8. Tough monkey.

9. When the going gets tough, the tough get going. 

10. Mostly it's tough.

11. A Tough Decision

12. Hello, tough monkey.

13. Oh, archaeology's tough.

14. Well, tough shit.

15. Tough last round.

16. Tough market, Vertigo.

17. One tough motherfucker.

18. Tough old goat.

19. Hi, tough guy.

20. Well, agoraphobia's tough.

21. Tough as teak.

22. Customer services, including customer account handling and customer acquisition and processing services

23. He's a tough kid.

24. I'm a tough chick.

25. Aye, mermaids are tough.

26. She's a tough kid.

27. She's a tough lady.

28. He is dreadfully tough.

29. As an adjective it is equivalent to "tough" as "It is tough" (Está cabrón).

30. I'm a tough chick!

31. He's a tough cookie.

32. It's a tough war.

33. You're too tough, right?

34. She's a tough one.

35. Yeah, real tough monkey.

36. Those are tough questions.

37. Pretty tough old man.

38. It's a tough road.

39. Customer?

40. Customer,

41. Tough Duck I26516 Tough Duck Balaclava, Universal, Fitted Adjustment Type, High Visibility Green HAWA I26516.

42. He's got a tough opponent.

43. I know times are tough.

44. She's a smart/tough cookie.

45. It was a tough race.

46. We're up against tough competition.

47. Tough order for a dive

48. Back acne can get tough

49. Things are tough all over.

50. Tough people stick it out.

51. Coots are tough, adaptable waterbirds

52. A Tough Nut to Crack

53. He's a tough old bastard.

54. So that's a tough one.

55. That's one tough dune coon.

56. 'Tough' and 'through' don't rhyme.

57. It's gritty, tough, warm-hearted.

58. He's a tough old bugger.

59. You have to be tough.

60. He has a tough character.

61. He's a wannabe tough guy.

62. 10 Foods tough to digest

63. Conway is a tough opponent.

64. You tried to be tough

65. " When the going gets tough, the tough get going, because winners never quit and quitters never win. "

66. Forget the soap, Ward, he's tough.

67. Tough glass is needed for windscreens.

68. Not so tough now, are you?

69. Looks like you're a tough guy

70. Accident could be a tough sell.

71. Things were pretty tough at first.

72. Both were tough on the prolix.

73. Isn't the meat a trifle tough?

74. It must be really tough. Oncology.

75. " In war we're tough and able

76. Equatorial Guinea's a pretty tough dictatorship.

77. Tough meat hardly worth the effort.

78. Brother, this lady is really tough.

79. Ascetic monks all have tough wills.

80. Coal-miners are a tough breed.