premature acceleration 

When the person behind you in traffic changes lanes and accelerates to pass only to find that there is not enough room and they have to get back in line.

Driver: Did you see that guy try to pass me? He had to slow down and get back in line.
Passenger: Yeah, that was a case of premature acceleration.

premature acceleration by Morgore December 18, 2008

Accelerationism 

A political philosophy that maintains that a country's current government/society is broken beyond repair, and the only way to fix it is to force things to get even worse so as to completely collapse the system under its own weight and remake it.

Often related to "taking the black pill."

Joey believes in accelerationism because he hates the world he lives in so much that he figures utter chaos is better than what's currently ongoing.

Accelerationism by AOmundson September 22, 2020

tripod mounted twin beam dual reactor multipurpose particle ray with a built in ion cannon 3d particle accelleration device with a tissue mutation bean cryo genetical freezing sereum intergrated missle defence system nuclear powered air refraction device 

Pretty self explanatory isnt it?

the tripod mounted twin beam dual reactor multipurpose particle ray with a built in ion cannon 3d particle accelleration device with a tissue mutation bean cryo genetical freezing sereum intergrated missle defence system nuclear powered air refraction device with a titanium plated nano enhanced bio genetic subterranean drilling unit with a cold fusion powered fission controlled pulse repition wave generator with a neuro planted japan made self installed mind manipularisation array with a biodegradable hand made master control terminal with a built in light emitting diode is good

tripod mounted twin beam dual reactor multipurpose particle ray with a built in ion cannon 3d particle accelleration device with a tissue mutation bean cryo genetical freezing sereum intergrated missle defence system nuclear powered air refraction device by Hows Your [FACE] October 14, 2006

acceleration 

Defined as the change in velocity over a period of time. Acceleration is a vector quantity and therefore is stated as a quantity with a direction.

a = (v-u)/t (where a, v and u are vectors)

Where (using SI units):
a = acceleration of the body in metres per second per second (ms^-2, or metres per second squared)
v = final velocity of the body in metres per second (ms^-1)
u = initial velocity of the body in metres per second (ms^-1)
t = time period between the initial and final velocity, in seconds (s)

An accelerating body can also be decelerating (ie, negative acceleration) or be at rest. Also, instantaneous acceleration is a bit different.

1) A car that is travelling at 2ms^-1 changes its speed to 6ms^-1 over a period of five seconds, and doesn't change direction. During that five seconds, it had an average acceleration of .8ms^-2 in initial direction.

2) A car travelling forwards at 2ms^-1 is suddenly put into reverse and five seconds later it is travelling 2ms^-2 backwards. It's average acceleration is .8ms^-2 backwards (-.8ms^-2 forwards). Note in this example, the car would have been temporarily at rest just when it changes direction. It is still accelerating (in negative direction, ie backwards, ie decelerating) during this period.

acceleration by White Razor December 24, 2008

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.

Premature Acceleration by Mit Long February 12, 2010

Mass times Acceleration 

Force

Force=Mass Times Acceleration

Mass times Acceleration by Little terry April 26, 2010

acceleration marks 

Acceleration marks are crap stains that you intentionally leave in your underwear. They are in essence, the opposite of skid marks, and are so named accordingly.

All that chilli I ate yesterday has let me do some sweet acceleration marks in my shorts. Just a little scratching is all it takes.

acceleration marks by the nesto December 23, 2007