It's simple really. First person posts a word then the person below them brings back the best/strangest result they get from searching it on google images and then post a new word. It's mild amusement for the whole family. 

I'll start

Word-Discard
[img]http://fc00.deviantart.net/fs71/f/2011/255/6/a/discard_by_femfan1-d49nqmx.jpg[/img]

New Word-Shipping