When you walk out of a sales meeting with your colleague and you high five in the parking lot, thinking you closed the deal, only to never hear from the client again.
Don't parking lot high five me bro. They didn't sign the contract yet!
Frequently used when two employees meet in the company parking lot to settle their grievances with fisticuffs. The victor can claim he gave the loser some "Parking lot Therapy."
Stan kept bullying Bob. On day, after work, Bob gave Stan some "Parking Lot Therapy" or PLT by massaging Stan's face with A BLURR Bob's fists. Now, Stan doesn't bully anyone. PARTICULARLY Bob.