"Whacked it instead," "Whack it instead," or "Whacking it instead." - Pronounced 'WEE'
Term used to describe someone who stays at home and/or locked in his or her room to supposedly 'whack it' rather than be social. This person will typically come up with excuses such as "I have work" to justify their self-confinement, but the extent of their personal removal from society suggests that they are probably WII.
Person A - "Why didn't John come to the movie?"
Person B - "Oh John, he can't come, he's WII"