Usually said sarcastically about someone who must complete an apparently simple task
All I have to do is teach simple slang words.
Why do I feel like such a miracleworker?
A Hispanic person who acts like a Caucasion
Juan is such a jicama, he belivies in strict immigration laws!
Said to someone when they used to provide very helpful things, but no longer do
You used to give me great things, but -
What have you done for me lately?
nown : a device which drains extensive amounts of resources
The DVR is a dracula, using tremendous amounts of power when you are not watching TV.