Improve upon acquaintance, to, [77]

Indian file, [199]

In for a penny, in for a pound, [34], [40]

Ins and outs, to know, [129], [226]

In vino veritas, [40]

Irishman’s gun, [86]

Irons in fire, too many, [63], [151]

J

Jack has his Jill, every, [192]

Jack of all trades, [196], [224]