Idioms (I)

I'll eat my hat
the icing on the cake
if it ain't broke, don't fix it
in a fix
in a flash
in a nutshell
in a pickle
in a tight spot
in a rut
in (somebody else's) shoes
in cahoots (with somebody)
in dire straits
in cold blood
in dribs and drabs
in droves
in full swing
in high spirits
in hot water
in league with (somebody)
in (my) book
in (somebody's) bad books
in one ear and out the other
in over (my) head
in (somebody's) pocket
in this vein
in the bag
in the clear
in the dark
in the doghouse
in the flesh
in the hole
in the long run
in the loop
in the pipeline
in the same boat
in the zone
in turn
in two minds
in (your) element
(know) the ins and outs
(the) inside story
(disappear/vanish) into thin air
(rule with) an iron fist
itchy feet