I:

If/when push comes to shove 45
In a bind/fix/jam vi, 4, 5, 6, 45, 67, 72, 104, 119
In a nutshell 9, 31, 45, 55, 60
In a pinch 45
In a rut 45, 63, 104, 119
In black and white 45, 109
In dutch (with) 1, 41, 45, 46, 105, 119
In full swing 45
In hot water 1, 41, 45, 46, 105, 115, 119
In/out of (one’s) element 26, 46, 66, 109
In/out of the mainstream 47
In over (one’s) head 46, 66, 105, 119
In stitches, have (someone)/be in) 46
In the bag 46, 54
In the black 46, 47, 105, 109
In the chips/money 46, 104, 105
In the doghouse 1, 41, 45, 46, 105, 119
In the long run 46, 105
In the loop 46
In the nick of time 21, 23, 46, 95, 105, 120
In the pink 47, 95, 104, 109, 119
In the red 46, 47, 105, 109
In the same boat 47
It’s all Greek to me 47
It’s no skin off (someone’s) nose 47
Ivory tower 47