A jailbroken iPhone.
I wanted to run apps like Swype on my iPhone, so I cracked it open and now I'm the proud owner of a poison Apple.
A sexually attractive person who is underage or otherwise illegal to have sex with.
Chuck, the big cheese, got a woodie whenever his assistant Lois walked by, but never schtupped her, since she was a poison apple. He was too samrt for that - besides, she looked like she wouldn't give it up without some work.