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

That wonderful feeling when you wake up on a cold morning and think your hot water bottle has stayed warm all night.
Then "SHIT THE BED" in thought, word and DEED!Thats shitting the bed! Worse if your partner finds it first

Jeff shit the bed when he hooked up with Marty instead of Ashlea.

1. "My car shit the bed when the timing belt broke."
2. "The boss is back from vacation early!" "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.