This is quite an easy game, but first here are the rules:
People post "duck" until a person posts "goose". That person has goosed the person above him/her. The person above him/her has to put something in his signature/avatar for up to a week.
E.g.:
Person 1: Duck
Person 2: Duck
Person 3: Goose! Write I'm in love with Chris in your signature and keep this for 3 days.
Get started....
Duck!