Top definition
A female/male that you are so attracted to that they have the ability to destroy your resilience to say no to sex regardless of your relationship status and location.
I can't go to coffee with him, he's sexual kryptonite we would end up in the car or bathroom in 5 minutes.
by Ms. MAS March 10, 2015
Get the mug
Get a Sexual Kryptonite mug for your buddy Georges.