Cold fission

The amicable splitting of a couple - not yet scientifically proven to be possible.

Mr Smith's publicist claimed that the split with his lover was cold fission.

by B Ligerati January 15, 2008

Butthole fission

When you split your asshole like a plutonium atom

"The energy of the future is butthole fission"

by U.S.S Pussy Destroyer December 06, 2016

Fission Product

Basically everything on the periodic table except extremely radioactive. Stereotypically known as the scary stuff that Fukushima and Chernobyl released from their damaged nuclear reactors poisoning the surrounding countryside forever.

The Fission Product releases from the spent fuel pool fire expelled many times the radioactive materials that one reactor could have released.

The fuel elements were ejected from the core during subsequent explosions and the fission products will be a hazard for many centuries to come.

The Fuel lava consists of various fission Products.

by Sir Geiger May 09, 2012

Binary Fission

When you stick your penis into your butt hole.

Person 1: Dude why are you limping?
Person 2: I just had Binary Fission last night

by willyson January 29, 2009

Fission Mailed

A word that is said in occurance when absolute and complete pwnage has been indignantly brought upon by a poor soul.

Allan FISSION MAILED! it when Travis threw a tennis ball at Allan's left nut.

by PLLL0WTALK January 06, 2006

Fission Mailed

Derives from the game "Metal Gear Solid 2"

it means "Mission Failed". which is used as a derogative term to slander someone/ someones argument that they've put forward in a debate, it is both patronizing and shows that you're putting an end to the argument.

Considered to be part of l33t sp33k. Gaming slang. Often used as the end of a sarcastic comment.

Oh yeah!! i forgot Lilly Allen does write good lyrics!! ......Fission Mailed.

by Intrinsic_IZ_Clutch July 20, 2009

unrequested fission surplus

a thermo-nuclear explosion due to a cooling system malfunction of a nuclear power plant or other nuclear powered system.

hiroshima enjoyed an unrequested fission surplus

by badasstattooz December 13, 2012