Gary Grundle pissed on himself during sex. He shit the bed.

"I hate my Samsung. I only had it a week before it shit the bed. I'm getting an iPhone."
When seeing the blue screen of death on your laptop: "Fuck! My computer just shit the bed!"
The lawnmower sputters to a stop in the middle of the yard. "There she goes--damn lawnmower just shit the bed.
After a disastrous first date: "Billy cooked for that hot girl on their first date. Talk about shitting the bed.

The Minnesota Vikigs really shit the bed this year.

The Canadian 2011 Junior hockey team shit the bed in the third period against the Russians.

Worker still at work meets guy coming to work before he leaves.
Geez, mate, why are you here so early?
Didja shit the bed?

Can I call you back? My phone is about to shit the bed.

"Shit the bed, we've been burgled!"

"Shit the bed, that feels good!"

"Shit the bed, I have a terrible hangover"