Smeg, smegging, smeg-head, smeg-bucket, smeg-face etc...
It's fun because it's a shortened term for Smegma (something incredibly disgusting), but no-one knows that. Plus it sounds harmless, although it can make you sound like a dork because it's said all the time in a sci-fi comedy called Red Dwarf.
DO NOT Google Smegma, you will regret it. Although you can google Smeg if you want to see some awesome kitchen appliances...