Whoopee Cushion Widget
The 3.0 version of Whoopee Cushion Widget for Mac is available as a free download on our website. The software relates to System Tools. This free Mac app is an intellectual property of Jacob Rath.
From the developer:
The Whoopie Cushion is a knee-jerk classic prank. It takes this old-school joke to a new level with a variety of sounds that will have everyone in the boardroom or in your office rolling with laughter. Simply press the Whoopie Cushion to produce a wonderfully funny sound.
You may want to check out more software for Mac, such as Calculator Widget, QSS Widget or .::LvL - Quake 3 Widget, which might be similar to Whoopee Cushion Widget.