When your working with clowns and one guy does something wrong you would say “ shit the bed “
Shit the bed I’m never touching a Radiator again!
When billy busted a but in his girlfriends pussy he proclaimed "I shit the bed"
When one golfer plays a round with someone who consistently underperforms
"E, you shit the bed again!" - JT
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 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.