A rare phenomenon when a infatuated teenage girl that is also bipolar during the school year suddenly becomes calm, stable, and fun to hang around during the summer hours. This happens most often at small private schools meant to help with learning disorders.
Sam: Man, I hung out with Sophie today
Ben: You mean the super crazy bitch who won't leave Jake alone?
Sam: Yeah man, she was really chill today, must be going through Psycho Hibernation
Ben: You mean the super crazy bitch who won't leave Jake alone?
Sam: Yeah man, she was really chill today, must be going through Psycho Hibernation
by S3pirion June 10, 2015

We know squirrels hibernate, and they dig in the dirt to hide their nuts... So... The Hibernating Squirrel is when you are doing a chick doggy style in the ass(Digging in the Dirt) and you tuck your balls inside her vagina (Hide your nuts)
by Higg9 May 26, 2008

The time between January and August when Hokie Nation (the people that follow Virginia Tech) have no sporting events worth watching since they are a one sport school.
Student 1: "Time for Hokie Hibernation until August since we lost to Michigan the other night in football."
Student 2: "Yeah, we suck at every other sport and have never won a national championship in anything."
Student 1: "What about bass fishing?"
NCAA: "That is not a real sport.
Student 2: "Yeah, we suck at every other sport and have never won a national championship in anything."
Student 1: "What about bass fishing?"
NCAA: "That is not a real sport.
by Hayweed January 06, 2012

Used to describe long periods of sleep (usually 12 hours+) following a long, hard or stressful day and/or making up for lost sleep
Sorry I didn't get your message. I havnt slept for shit all week, I passed out round 10 and went into hibernation mode till 11 the next morning.
by SevenEvils October 22, 2015

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.
by sly foxy December 20, 2016

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
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
by Nature Lover December 24, 2007

Occurs during the winter when a bear, most commonly of the grizzly or kodiak family, needs to find a nice warm cozy spot to take a several month long nap. What separates this special type of hibernation from the usual kind is that this bear finds a ridiculously floppy va-jay-jay and crawls inside it for the duration of the cold months.
Tom: Hey did you see Patty walk by? It looks like she's put on about 400 pounds in the pelvic region!
Stan: I know, I noticed that as well. Then again, it's almost winter, so I bet that bear we saw in the forest the other day is getting ready for a Scottish Hibernation.
Stan: I know, I noticed that as well. Then again, it's almost winter, so I bet that bear we saw in the forest the other day is getting ready for a Scottish Hibernation.
by Funky Junk in my Trunk January 27, 2009
