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?"
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!"
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.