Instant Classic 

1.) Referring to something being "extravagantly awesome".
2.) The nickname of the greatest, most charismatic professional wrestler in recent memory, TNA Wrestling's Christian Cage.

1.) Dude, Terminator 2 was an Instant Classic!
2.) "The Instant Classic" Christian Cage is a two-time NWA World Heavyweight Champion!

Instant Classic by Neil S. April 6, 2008

Instant Karma 

Swift and intense negative happenings in someone’s life after they screw over or do something shady to another person, sometimes a friend but not always can be a random person.

“Did you hear J got fucked up in that car accident?” “Yeah I heard that sucks but it’s Instant Karma man he should have never made shit up on D and called CPS.”

Instant Karma by The Dark Doc December 30, 2017

instant expert 

Someone who looks up a word or a fact on a search engine, such as {Google}, looks at a few articles or definitions, mostly on {Wikipedia}, and decides they now know everything about it.

Person one: "Whoa. So now Jason started an argument with me about which of the American Presidents are the best and worst. Yesterday, he didn't know anything about them."

Person two: "He {Googled} them, obviously."

Person one: "you're right. He's become an instant expert."

instant expert by Astor G. February 28, 2008

Instant Zen 

LSD.

Dude, Adam brought over some crazy instant zen last night, I'm still trippin'.

Instant Zen by mighty legume April 19, 2009

Instant Flaccidity 

An adjective describing a member of the opposite sex that is so thoroughly repulsive that you couldn't and wouldn't be able to have sex with them under any circumstances.

The new supervisor at work is ok, but once she opened her mouth you knew it was instant flaccidity.

Instant Flaccidity by RocketManFL January 15, 2007

instant messenger 

A form of internet communcation where 2 or more people talk to each other in real-time without going through a browser chatroom. A few of the most common instant messengers are ICQ, AIM and MSN.

AIM stands for "AOL Instant Messenger".

instant messenger by Amantis April 5, 2005

Instant Win 

A term which originally became popular in the days of Starcraft. It was used to designate a particular strategy or attack which would guarantee victory for whomever was using it. It was often used in conjunction with the popular equation, "Mass Carriers = Instant Win". The strategy of mass-producing the largest aerial unit in the game and using it as the sole attack force remained popular, and later spread into Warcraft 3, where it gained the updated equation, "Mass Wyrms = Instant Win".

Mass Zealots = Instant Win!

Instant Win by Aganar March 31, 2005