The act of taking a crap in the cistern of the toilet. The turd then hibernates for a couple of months before being broken down enough to emerge during flushing.
Person 1: OMG i just flushed the toilet and shit came out instead of water
Person 2: Dude you awoke my bear, it's been hibernating for the last 4 weeks
Person 1: You did a hibernating bear in my toilet...you're seriously fucked, we are not firends anymore
Person 2: fuck off, its the funniest thing ever
Person 1: yer i guess your right, after all i did leave a coffee bean in your kettle