I've always said that kids are the best insulters. The verbal sparring they do is inspiring to hear when they're trying to out-slag each other. I got loads of it in school and finally achieved the position where it becames water off a duck's back, which is a position I know lots of people would give good money to reach.

So anyway, some graffiti I saw a few days ago really tickled me:

"I shagged your mum so hard she had a baby the same day"

Inspired!