Verb meaning to lift the lid off a toilet cistern and subsequently crap inside. Your shit will go undetected for months, except that each time someone flushes the smell will be released. It gets worse with every pull of the chain as the festering turd decomposes. Try top decking your enemies - it's the gift that keeps on giving.
I hate that jerk! Next time I'm round his house I'm gonna top deck his m*therf*ckin' toilet