5-4 Decision 

Any poorly thought out decision made with little regard to future consequences, such as the ones often made as the result of the many 5-4 decisions passed down by the SCOTUS.

Can also be referred to in the truncated form "5-4."

"Yeah, I slept with Jenna last night. ... Bareback..."
"Dude, that was a 5-4 decision right there."

"I drove home from the party after drinking heavily all night. I got home alive but that was a real 5-4."

5-4 Decision by MisterTik June 29, 2011