Half Life

1 : the time required for half of something to undergo a process: as a : the time required for half of the atoms of a radioactive substance to become disintegrated b : the time required for half the amount of a substance (as a drug or radioactive tracer) in or introduced into a living system or ecosystem to be eliminated or disintegrated by natural processes
2 : a period of usefulness or popularity preceding decline or obsolescence <slang usually has a short half-life>

For americium-241, it is known that half of the atoms decay in 458 years. Therefore, 458 years is the half-life of americium-241. Every radioactive element has a different half-life, ranging from fractions of a second to millions of years, depending on the specific isotope. For example, americium-243 has a half-life of 7,370 years.

by Mark January 06, 2004

Fo shizzle dat nizzle

This means to kill that badass

Person: Lets go Fo shizzle dat nizzle

by Mark March 08, 2005

nether hole

another word for the anus; not to be confused with the nether eye (a word used by chaucer in the canterbury tales), which refers to a woman's genitalia (read: vagina).

my nether hole was in sore need of relief.

by mark February 02, 2004

U R Gay

Name of a South American country as pernounced by Homer Simpson

Homer points to a map of the world, pointing to Uruguay he says:hhehehehe look at the name of this country! U R Gay!

by mark December 08, 2003

cane

To do (something) recklessly and at speed

tr.v. caned, can·ing, canes

"...and Ayrton Senna has caned the hairpin"

"She just caned that whole bag of charly"

by Mark January 04, 2005

jettadenial

A car whose owners' criticize japanese cars for being too slow and "riced" up, when in fact they themselves should be criticized for thier girlish design and numerous upgrades.

That guy is in jettadenial, he won't accept the fact that he drives a motorized pansey, but instead spends his time making fun of Japanese cars.

by Mark March 09, 2004

ass cheese

1. The substance removed from the back area near the anus that when rubbed out looks like lint.

I just picked some ass cheese from my butt

by Mark December 21, 2004