Short for immediately.
right this instant
"John stop that IMMED!!!"
"We need to jump on that IMMED!!!"
meaning "istant message", when someone gets an account from a "instant message" company, and add's your screename, and talks to you when theyre bored
*****:hebrew means drugs, i IMmed you
an extremely mysterious person
who everyone seems to know
but no one has ever seen in the flesh
person 1: dude, shmuel immed me last night
person 2: who the hell is he? i talk to him all the time but i've never actually seen him
person 1: i hear he's a pimp