Wikiass

n. The source of anything presented as fact that sounds unverified, unbelievable or otherwise devoid of fact.

Adj. Anyone who over-quotes internet based "knowledge exchanges", like Wikipedia, Wikianswers, Answers.com, etc.

Noun
Son: Dad, Tiësto is bigger than Elvis!
Dad: Where'd you pull that from, your Wikiass?

Adjective:
Guy #1: Dude, Steve Jobs was the greatest inventor-genius of all time. He's been cited as primary or co-inventor on 241 patents in the US Patent Office.
Guy #2: How do you even know that?
Guy #1: Answers.com! And did you know Steve Wozniak is worth about $6.2 Billion?
Guy #3 (under his breath): What a Wikiass.

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PDA Yawn

The, sometimes involuntary, brief peek at your Blackberry, iPhone or other PDA when you are bored in a conversation, group interaction, business meeting, movie, sporting event, etc. Has the same seemingly posthypnotic contagious effect as a traditional yawn.

Guy #1:"Seriously, did someone just call you guys, or was that a PDA yawn?"
Guy #2:"Sorry, I just lost focus when you were talking about your Bijon Frise rescue dog."
Guy #3:"Oh, uh, sorry dude."