IAAA

I am an accountant

IAAL

I am a lawyer

IAC

in any case

IC

I see

IAE

in any event

IAG

it's all good

IAG

I am gay

IANAA

I am not an accountant

IANAL

I am not a lawyer

IBN

I'm buck naked

ICOCBW

I could of course be wrong

IDC

I don't care

IDGI

I don't get it

IDGARA

I don't give a rat's ***

IDGW

In a good way

IDI

I doubt it

IDK

I don't know

IDTT

I'll drink to that

IFVB

I feel very bad

IGP

I gotta pee

IGTP

I get the point

IHTFP

I hate this ******* place

IHTFP

I have truly found paradise

IHU

I hate you

IHY

I hate you

II

I'm impressed

IIT

I'm impressed too

IIR

If I recall

IIRC

If I recall correctly

IJWTK

I just want to know

IJWTS

I just want to say

IK

I know

IKWUM

I know what you mean

ILBCNU

I'll be seeing you

ILU

I love you

ILY

I love you

ILYFAE

I love you forever and ever

IMAO

In my arrogant opinion

IMFAO

In my fu*king arrogant opinion

IMBO

In my bloody opinion

IMCO

In my considered opinion

IME

In my experience

IMHO

In my humble opinion

IMNSHO

In my, not so humble opinion

IMO

In my opinion

IMOBO

Iin my own biased opinion

IMPOV

In my point of view

IMP

I might be pregnant

INAL

I'm not a lawyer

INPO

In no particular order

IOIT

I'm on Irish Time

IOW

In other words

IRL

In real life

IRMFI

I reply merely for information

IRSTBO

It really sucks the big one

IS

I'm sorry

ISTM

It seems to me

ISTR

I seem to recall

ISWYM

I see what you mean

ITRO

In the reality of

ITRW

In the real world

ITSFWI

If the shoe fits, wear it

IVL

In virtual live

IWALY

I will always love you

IWBNI

It would be nice if

IYKWIM

If you know what I mean

IYSWIM

If you see what I mean