51.
By the skin of one's teeth

52.
Harp on

53.
To be at daggers drawn

54.
To get into hot waters

55.
A fair crack of the whip

56.
To take with a grain of salt

57.
To snap one's fingers

58.
To throw down the glove

59.
To catch somebody on the hop

60.
To turn up one's nose at a thing

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