Someone who can take a perfectly working item and turn it into junk. Total opposite of MacGyver who makes working items from junk.
Casey is a total Anti-MacGyver, she broke her new ipad on the same day she bought it.
(Verb) To transform a technologically advanced item into something totally worthless, usually through an act of utter stupidity.
Dude, you totally reverse macgyvered my cell phone into a paper weight when you dropped it in the toilet.