Chrome extension that replaces occurrences of 'the cloud' with 'my butt'. I forked it from panicsteve and added some basic German support too (if you ignore the genitive).
http://www.flickr.com/groups/cloud-to-butt/
In Chrome, choose Window > Extensions. Drag CloudToButt.crx into the page that appears.
Can be found here: https://github.com/logancollins/cloud-to-butt-safari
Can be found here: https://github.com/DaveRandom/cloud-to-butt-mozilla