hibernating bear 

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

hibernating bear by Nature Lover December 24, 2007

The Bear is Hibernating 

When you want to tell someone that they, or someone else is butthurt. Or seem as if they have a stick in their anus.

Person 1: Sara has been giving me the evil eye since I got the boy she was trying to get with.
Person 2: The bear is hibernating.

The Bear is Hibernating by Cinnamon Raven November 6, 2014

Hibernating Bloody Polar Bear 

A variation of the bloody polar bear.

In this scenario, one packs the bloody polar bear under a significant amount of snow. Come springtime, the snow will reveal a perfect bloody polar bear fresh and ready for use.

Michelle: Ashley you won't believe what i just found in the yard!

Ashley: Oh my god Michelle whatever could it be?

Michelle: The Bloody Polar Bear I buried in December!

Ashley: Say it isn't so! The infamous hibernating bloody polar bear!

Hibernating Bloody Polar Bear by The Arctic Polar February 22, 2011

hibernation bear 

A girl who goes into hiding during winter because she hates the cold so much. You won't see her until spring comes and she's finally shaved her legs.

Ashley is my little hibernation bear from October until May.

hibernation bear by sly foxy December 20, 2016