What is W.i.l.k?
Literal Definition - Work
When you can't get the ketchup out of the bottle you furiously shake it up and down until finally some comes out.
Use this when someone is being weak.
Or to speed someone up.
Put some backbone into it and w.i.l.k it!
If you don't want to miss your plane you might want to w.i.l.k it over there.