Poor life decision. An action that in retrospect, was not the best of ideas. PLDs are generally not performed while thinking clearly and usually lead to immediate regret.
The opposite of GLD (good life decision).
"Whoops, I got drunk and made out with my best friend. PLD"
"I heard loud thumping in my parents bedroom and walked in. PLD"
"My chemistry test is tomorrow, so I decided to stay up until 4 am watching lifetime movies. PLD"
"I couldn't find the trash can so I left the tuna sandwich under my bed. PLD"
"I went to see the movie Osmosis Jones. PLD."