| I can tell you | | | |
| I can't hear you over the sound of | | | |
| ice-cold | | | |
| ice cool | | | |
| I choose violence | | | |
| icing on the cake | | | |
| idiot mittens | | | |
| I'd like to see someone try | | | |
| I'd say | | | |
| if anything | | | |
| if I'm not there, start without me | | | |
| if it's all the same | | | |
| if needs be | | | |
| if nothing else | | | |
| if these walls could talk | | | |
| if the shoe fits | | | |
| I have a bridge to sell you | | | |
| I just work here | | | |
| I'll be bound | | | |
| I'll be damned | | | |
| I'll say | | | |
| I'll tell you | | | |
| I'm not the one | | | |
| I'm sure | | | |
| in a big way | | | |
| in a bind | | | |
| in a bubble | | | |
| in a corner | | | |
| in a flash | | | |
| in a foam | | | |
| in a hen's hiney | | | |
| in a jam | | | |
| in all modesty | | | |
| in all one's glory | | | |
| in a minor key | | | |
| in and of itself | | | |
| in any case | | | |
| in any event | | | |
| in a pig's arse | | | |
| in a pig's eye | | | |
| in a real state | | | |
| in a right state | | | |
| in a state | | | |
| in at the deep end | | | |
| in bad shape | | | |
| in bad taste | | | |
| in business | | | |
| in capital letters | | | |
| inch away | | | |
| inch back | | | |
| inchmeal | | | |
| inch-perfect | | | |
| in cold blood | | | |
| in collar | | | |
| in deep | | | |
| in detail | | | |
| in Dickie's meadow | | | |
| indict a ham sandwich | | | |
| in effigy | | | |
| I never did | | | |
| in evidence | | | |
| in fee | | | |
| in for a dime, in for a dollar | | | |
| in for an inch, in for a mile | | | |
| in for the kill | | | |
| in front of one's nose | | | |
| in good odor | | | |
| in good sorts | | | |
| in high dudgeon | | | |
| in high gear | | | |
| in jig time | | | |
| ink in | | | |
| in layperson's terms | | | |
| in laywoman's terms | | | |
| in living memory | | | |
| inner circle | | | |
| in no small measure | | | |
| in no small part | | | |
| in no uncertain terms | | | |
| in no way, shape, or form | | | |
| in one foul swoop | | | |
| in one go | | | |
| in one's bare skin | | | |
| in one's bones | | | |
| in one's head | | | |
| in one's hip pocket | | | |
| in one's pocket | | | |
| in one's right mind | | | |
| in other news | | | |
| in other words | | | |
| in plain view | | | |
| in rare form | | | |
| in record time | | | |
| in retreat | | | |
| in shape | | | |
| in short pants | | | |
| inside job | | | |
| inside joke | | | |
| inside the box | | | |
| in someone's black books | | | |