'Meerschweinchen' is guinea pig. 'Meerschweinchenaufgabe' is guinea pig task. Mein Gott, Wilhelm - wo ist die Rübe???? ("Wilhelm - where is the turnip?" :) nerdy2 (who is German) gave a hilarious link to The Awful German Language by Mark Twain.
After seeing dangermousie's list I thought I'd do mine here because I don't want to hijack her thread and two there's never enough room in comments..... ( List of my favourite tv shows )