(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.

Strong ass Weed

1.Tight mutha fuckin song by Purple All-Stars

2.Sum Strong Bud

the only weed better than superman weed

kryptonite is a strain of weed originating out of Norcal in the town of yuba city, its a f-1 hybrid, pure kush plant with ultra potent nugs that taste like og or bubba kush not for light weights

Strong ass weed, song made popular by Purple Ribbon (who are da shit), and Superman's worst nightmare.

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!

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