Kryptonite

[Sarah]

Strong ass Weed

[Justin Bieber]

Related to the Superman movies: Supermans weakness.The only thing that can hurt the man of steel.

My definition:

A man/woman that calls someone their Kryptonite means that they are their weakness. Someone or something they have to stay away from because they want it even though its not good for them or will hurt them.

Someone you want but cant have can be called your Kryptonite.

[Tanya Shivari]

1.Tight mutha fuckin song by Purple All-Stars

2.Sum Strong Bud

[Tina]

Kryptonite is a compound consisting of the element krypton, according to chemical-forming -ite nomenclature of chemistry.
However, krypton is a planet where Superman Clark Kent comes from and the substance kryptonite from it due to the explosion is fatal to our Superman, i.e. the translucently green rocks you would see in the TV series and which make Clark Kent dizzy and feeble and can even kill him.
Thus figuratively, it means something that makes you weak, powerless and limp, i.e. your weakness, whenever it comes to you, because it can even weaken Superman, let alone you!

[Britney]

the only weed better than superman weed

[PussyCat]

Intellectually powerful enough and attractive enough to seduce the strongest willed Playas, Pimps, Macks,Daddies,Hubbies, and Champions.

[Sarah]

the weakness of an otherwise invulnerable or confident person (especially a heroic person), Achilles heel

crystallized, smokeable cocaine

[Tina]

Something or someone who makes you weak, even if you are a very strong person

[PussyCat]

(in the fictional word of the cartoon, TV, and film character Superman) an alien mineral that has the property of depriving Superman of his powers.