Post-facto spoiler alert 

When you accidentally spoil something for someone and then attempt to make it up by yelling out "Spoiler alert!"
It will nonetheless piss someone off because either a) you're just rubbing it in that you spoiled the ending to an amazing movie/book/show, or b) they weren't really paying attention before and would have missed the spoiler, but because you had called attention to it, now they are aware they have been spoiled.

Kris: "So I'm reading this Harry Potter book and so far I don't like that Snape fellow."
Melissa: "Yeah I really hated Snape in the 6th book when he killed Dumbledore but everything worked out in the end."
Kris: "Ye- Wait. Snape KILLS Dumbledore?!"
Melissa: "Er, ah, um, SPOILER ALERT!!!1"
Paul: "Wow, Melissa, way to pull a post-facto spoiler alert."
Kris: "It will never be the same!" *sobs*

Post-facto spoiler alert by millardfillmore April 19, 2010

post mastication turbulence

What happens after eating beans or spicy food.

After eating at a Mexican joint last night, me and my buddies got severe cases of post mastication turbulence.

post mastication turbulence by dogbreath57 September 14, 2010

Post Sex-Generation 

Similar to the The Sex-Generation, the post sex-generation is a generation born in the early to late nineties and grew up between the years of 2000 and 2012. Those who are born in the sex generation, have grown up in a culture where sex is viewed as a less intimidating and "hush-hush" topic. This generation would be considered much more open-minded than The Sex- Generation, towards topics of and relating to sex. The act of sex in the post sex-generation is also more openly discussed than in the previous generation.

I was born in 1994 and am part of the Post Sex-Generation

Post Sex-Generation by kanyewasright January 20, 2011

Post piss 

The act of finishing peeing and starting to close up shop, then dripping down your leg.

*Walk out of bathroom with wet spot on your pants.* "Yeah I just post pissed myself."

Post piss by Bkeith87 February 28, 2011

post sandwich depression 

the feeling you get after you finish eating a darren turkey chip special

guy 1: Man, are you feeling alright?
guy 2: No man I just ate this sandwich, and now I think I've got post sandwich depression.

post sandwich depression by dumbledarren March 9, 2011

Post Panda Paralysis 

The malaise state one experiences after engorging oneself on panda express.

No I cant get off the couch and do that, I am suffering from Post Panda Paralysis

Post Panda Paralysis by Philosophical Harassment Panda April 29, 2011

Post workout sleepies 

The condition of extreme lethargy following a workout and a meal.

Bro, I went hard at the gym and the dining hall. Now I've got a serious case of the post workout sleepies. Nap time, brah.

Post workout sleepies by swolity May 21, 2011