The initial idioms of the letter I

iron curtain	an iron fist in a velvet glove
iron hand	iron in the fire
iron man	iron out
iron out the kinks	iron out the wrinkles (of/in something)
iron the wrinkles out (of/in something)	irons in the fire, too many
irregardless of	Irv
Irvine	be a crock of shit
be a tall order	is all
is all need	is anyone's guess
be as clear as mud	be as cool as a cucumber
is at disposal	is bag
is better than nothing	is beyond me
enough to plague a saint	go off-kilter
go out of kilter	have a rough trot
is in business	is it