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1.
During a phone call or office conversation, a pregnant moment of silence while someone queries Wikipedia, before announcing a previously-unknown piece of information.
Iain: So is fennel a vegetable?
Liz: Wikipause.......... No, it's a highly aromatic perennial herb.
by IainC May 15, 2007
 
2.
The time between asking your friend a question over the internet, and them looking it up on wikipedia, then answering pretending they knew it all along.
Spencer-"What happens if you eat gone off houmous?"

*Wikipause*

Katie-"Er not, not much. Its only blended chickpeas, blended tahini, lemon juice, salt and garlic"

Spencer-"Don't even pretend you knew that, I felt that wikipause!"
by Spanky89 May 15, 2010