About 10 days ago (Sunday) I caught some of the highlights of Oz TV Channel 7 Nightly Olympic Highlights with Fatso the Fat-Arsed Wombat on UK TV. Some bits were very funny.
The International and Australian Olympic committees were not very amused by this wombat becoming the unofficial mascot of the Australian team and getting into the act , see http://liberalbranches.org/comment/ed_fatso_25sep00.htm

"As unwelcome as a fat-arsed wombat at an olympic committee meeting"
is my suggestion.

Rod