Underknock your opponent 4 times this week.
This one will be easy for anyone with a friend on the phone (or on skype or on im etc.) or for anyone double-browsing.
Two friends can do this one in no time. Play until both can knock and have the one with higher points do the knocking. Lather, rinse, repeat.
When it gets down to the point that one friend has the badge, it's not too hard to manipulate the discards etc. until that person has the higher points for knocking to finish off the friend's badge. Done!
