Kryptonite 

A female that you can help but go back to even though she's bad for you

Yo son why you keep goin back to her

Can't help it man she's my kryptonite she got I pull on me

Kryptonite by Young beez May 12, 2009

kryptonite 

1. The only substance that can harm wordSuperman.
2. (metaphorical) Something you have a strong aversion to.

1. Kryptonite is Lex Luther's only defense.
2. No mayonaise please; that shit is kryptonite to me.

kryptonite by zachwolff October 20, 2003

kryptonite 

(n.) a form of crystal methamphetamine that turns into a green liquid when melted for the purpose of the inhallation of its vapors.

Man this ice is kryptonite, this shit is crazy.

kryptonite by clownpenis January 6, 2006

kryptonite 

Anything that's "poison" to you, something that's so horrible you'll always want to stay away from it.

Sandra loves music by Philip Glass, but she can't stand anything by John Adams. She thinks that John Adams' stuff is musical kryptonite.

kryptonite by pentozali March 3, 2008

Kryptonite 

a lethal mix of viagra and cocaine used by men during devious sexual acts for the purpose of trying to escape a mid-life crisis post tramatic limp syndrome and usually end up dying, shaming their families for life.

did you hear what happened to John this weekend?
he died in a motel 6 from using kryptonite on a water buffalo .

Kryptonite by Mickey Darling August 3, 2009

kryptonite 

(noun)
1: A green, radioactive metorite, broken from the distant, late planet of Krypton, that cancels out any Kryptonian's superpowers, such as Superman.
2: Something that is a great weakness to a particular person, such as the aforementioned metiorite to Superman, etc.

1: Krypto the Superdog (of the said show): Kryptonite... my one weakness...
2: Galatea (Justice League Unlimited): Boredom is my kryptonite... well, kryptonite is my kryptonite, but you get the idea.

kryptonite by DanMat6288 August 3, 2005

kryptonite 

Best type of weed in the world please believe it

That kryptonite kept me indoors last night

kryptonite by HintonSparks October 15, 2006