Verb - a portmanteau of the words 'Wikipedia' and 'it'. Wikipedia being the online, openly collaborative encyclopedia, well known for holding defintions and information for over 16,000,000 articles in roughly 262 languages - making it possible to look up just about anything. To "wik it" is to use this site to find out about a particular subject quickly - albeit the information may be disputed and is not always 100% guaranteed to be completely factual.
Personal 1: "Hey, how far is it between the Sun and Uranus?"
Person 2: "I have no idea, Person 1"
Person 1: "Oh... I know! Why don't I wik it?!"
Later...
Person 2: "Did you wik it?"
Person 1: "I did! Now, not only do I now know that Uranus is 3,000,000,000km from the Sun, I also know that it has an axel tilt of 97.77 degrees. Wow, I feel a lot better. Hmm, I wonder where Hugh Jackman was born..."