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1.
people with a very big variety of interests (jacks of all trades, polymaths etc) often to the point that they don't know what to choose as they don't want to give up their other interests
Jim has tried this and that but still hasn't decided on a clear path, he is, I guess, what you call a scanner. Sadly, he's in his early thirties.
by U8IK March 24, 2011
 
2.
1. Either a deivce attached to a computer that allows it to take a picture or text from another source, and transfer it to the computer.

2. In some science fiction novels, scanners trace brain patterns, allowing the user to read ones mind.
This scanner is sucking, it can't even get the image!

I scanned his brain because I am a jerk.
by mr. pockets January 16, 2007
 
3.
To intentionally or unintentionally copy another persons opinions, ideals, visions of the future and vernacular in order to obtain acceptance from their peers in a lame attempt at awesomeness.
Person A: yo, crosby fucking suckkks. worst player in the nhl by far.
Scanner: yeah man, he sucks! hes definitely the worst player ever!!!1!1!!11!!!!!
Person B: do you ever formulate your own opinions, or are you just going to piggyback on everyone elses?
Scanner: (To Person A) yeah ya duster, stop copying me.
Person B: ughhhh, what a fucking scanner.
by d-bombbb March 02, 2009