As the late George Carlin said: You ain't cool! You're fucking chilly! And chilly ain't never been cool!"

Words that are overused and if George Carlin was here, he would say this, so here goes.

Three words that NEED to be dropped from usage for overuse and incorrect usage. You SOUND like a fuckin' 'tard if you are using these.
1) "SICK" meaning cool, neat, enjoyable. Look, somewhere along the tracks, you lost your way if you think "sick" is a term of approbation. Degenerates, Hitler, people with incurable diseases are "sick" and that ain't cool. Drop the stupid use of this word and act like a fuckin' grown up, will ya?

2) "Absolutely" - Look, "absolutely" is not a one word language, and yet, many 20 something 'tards are using "absolutely" to answer every question put to them.
From the Free Dictionary dot com
"ab·so·lute·ly (bs-ltl, bs-ltl)
adv.
1. Definitely and completely; unquestionably.
2. Grammar
a. In a manner that does not take an object.
b. In an absolute relationship.
Usage Note: For some time, absolutely has been used informally as an intensive, as in an absolutely magnificent painting. In an earlier survey, a majority of the Usage Panel disapproved of this usage in formal writing."

3) Actually, this is two, but they are variants of the same idea.
"Off the hook" and "Off the chain". Off the hook and off the chain imply letting some dangerous beast loose, and if that is meant to indicate something cool, then get mauled by a grizzly and see how you like that.

4) Used interchangeably with the foregoing "off the hook" and "off the chain" is a word I hear used so frequently it makes me nauseated. "Awesome". Often, it is a word thrown out there to have some nebulous positive meaning, but really, it just shows an impoverishment of both the user's thinking processes and the bankruptcy of their store of proper words. Seeing Thor come down from the heavens, accompanied by Loki and Frigg, and then, seeing them battle Zeus and the other Greek gods would be "awesome", but getting a pair of tickets to a local basketball game, somehow lacks the luster of actually generally a genuine feeling of "Awe" in a person.

SO, if someone tells you that they are going to a party that is going to absolutely be off the hook and off the chain and there will be an awesome DJ there who is playing some sick records...first, pity them and the school they attended, and secondly, give them their letter "L" for Lamer and Loser, so they can wear it with pride. They earned it.