INAH is used in IM conversations, and means, "I need a hug".
Ash: me so sad INAH so bad!!
Sexii Dude: *sends little hug emoticon*
Ash: Thx!!! UR the bestest!!!
its usually stand for "I need a hug" when somebody feels lonely or sad...and you know...when you need a hug...
girl 1: *crying* my doggy die!"
girl 2:awww dont cry...
girl 1:INAH!! i feel so upset...
girl 2:come here *hugging*