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1. rearing to go
eager to begin; sometimes "raring" to go; the metaphor is equestrian and like other equestrian allusions "champing at the bit" it connotes that something or someone else is in control, in this case preventing immediate gratification
The twins were rearing to go on the drive to Disney World.
2. Kewl!
A more elated version of the word cool. Kewl is excited, happy and completely on board with what is being discussed with almost no further thought. It differs from Cool in that Cool is more detached and slightly unaffected like "hmmm, I'm thinking yeah...and I gotta think further about this". On the contrary, Kewl is when you are ready and raring to go!
What? You wanna Karaoke tonight?! Kewl!!! Let's do it!
3. raring
1. something that you eagerly want to do or experience.
2. an event that you anxiously await, full of anticipation and you look forward to doing it because it's exciting.
1. I'm raring to go see SIN City in theatres this friday!
2. Whitewater rafting is something we've all been raring to do for the summer.
by fitchickxina Mar 30, 2005 add a video
4. Premature Acceleration
When a automobile begins to accelerate before it is prudent. Most often witnessed at intersections that are controlled by traffic lights when a driver incorrectly assumes that it is his turn to go next.
Driver: Look at that guy raring to go. I'll bet he doesn't know that it's my turn to go next.

<Car in question moves about a foot and then stops abruptly as he realizes his light did not change green>

Passenger: How embarrassing; a classic case of premature acceleration.
5. banging on the door
When you've got a shit that's raring to go and you've got little chance of making it stop...
Aw, com'on mate, we have to find a loo, this shit's really banging on the door!
6. tyson gay
1. noun : Second Fastest Man Ever.

2. adj :

when you try so hard engaging in months of preparing, gruelling training - sweating it out , hoping and raring to go out there and give it your best to win and restore glory - only to do all that and just fumble a distant, distant second - being beaten by a better person by a mile, you've had a tyson gay.
Tyson Gay's 9.71 (s) at the 100m Final at Berlin 2009 was obliterated my Usain Bolts' groundbreaking 9.58 (s).

Tyson Gay ran 9.71 , on any other race, he would have obliterated the field, but against Usain Bolt, you come out second , not my an inch, but by several metres, still. Usain Bolt beat Tyson Gay in the 100m Final at the Berlin World Championships, August 2009, bettering his 2008 Beijing Olympics 100m record of 9.69 by 0.11 seconds, registering a brilliant 9.58 seconds to blow them all away, Tyson Gay included, who, with the third fastest time ever recorded (after Bolt's 9.58 and 9.69) came a distant, distant second.
You could tell he ran the race of his life and gave his life, but just wasn't to be, because when you are facing against the man they call Bolt - you just weren't born to be good enough.
7. Hornucopia
Similar to the idea of a cornucopia (which is a symbol representing food and abundance) Hornucopia is a word used to describe all the things that get you randy. Or raring to go. Or ready to get jiggy with it. Or just plain ol' turned on. Could be used to describe an event, a place, or just as a general idea.
God, that party was a hornucopia!!

or

She was my hornucopia!!

or

Where's my hornucopia?!?!!?
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