Not just "fucking up really bad." Used to emphasize the way that the really bad fuck-up harms or humiliates the person who fucked up. The idea of shitting the bed is not just a) that the person intended to do one thing but instead laid a giant turd but also b) that the person laid that turd in their own bed and now has to lie in their bed of shit.
Darlene merely laid a turd by flunking the algebra test. Mike completely shit the bed when he cheated on the test and got caught and expelled from school.
After looking like possible superbowl contenders in the 2017 season. The Jaguars shit the bed in the 2018 season.
To get out of bed very early on a day where you would normally sleep in.
"You're up early! Did you shit the bed?"
When they lost to FDU they Shit the Bed
One night after drinking heavily, I decided to give myself 2 IV bags cause I was super drunk. The good news was that I woke up without a hanger, bad news is that Purdued the bed. They really Shit the Bed
Shitting the bed/shat the bed
To shit the bed is when you fuck something up so badly you hear it from the people around you for the rest of your life.
Tyrone really shit the bed when he told us about how he fucked a pineapple
-Jake
Oh you mean spongebob - John
When you fail miserably, usually with style, on a given task. Most commonly used when you're given an advantage and/or something easy, and still manage to screw it up.
John: Boy, you really shit the bed on that one. How do you lose a 4 v 1?
Karl: You're 0 and 3, stfu.
A question or statement that is used to explain, ask or acknowledge why the hell you are awake and functional at an ungodly hour or earlier than usual.
Son never gets out of bed before 2pm on weekends but this Saturday he's awake and functioning at 10am.
Dad sees him and says "what? did you do SHIT THE BED?"
Roberta wakes up and is mobile at 4:30am. She tells her friend "Ya I SHIT THE BED this morning. Was up and at 'em at 4:30!"
The Office Supervisor, Carol, routinely starts work whenever she wants, usually arriving after lunch. However this morning she's at work on time.
You see Carol at her desk when you arrive at work and say to a co-worker "Wow, Carol's here on time , she must've SHIT THE BED this morning.