Are you an internet broadcaster? Maybe you're the family commedian? Whatever the case, this site may be of some help.
Instant Audience is a simple soundboard application written in Flash. Simply click on the sound you want and it's played. Sounds include:
This worked fine for me in Internet Explorer, but had some problems with Firefox. You'll need the Flash Player for this to work at all.
Click this link to find your Instant Audience.