means "Pretty big deal."
It can be used on its own, but it is typically used as a response to counteract "No big deal" or nbd.

Also for emphasis: pbfd = "Pretty big fucking deal."
1. Person A: "I just saw Joseph Gordon-Levitt walking out of Starbucks, nbd."

Person B: "Uhh... pbfd."

2. In the Christian religion, the birth of Jesus was apparently a pbd.
by bearcavalrycommander October 26, 2011
PBD, otherwise known as post beat-off depression is the state of mind that males will pass into after masturbating. The male may wonder why he did such a thing, think it was gross, and then cancel that 800mb porn download that had been going all day. This is commonly followed by DAR.
"fap fap fap ughhhhhhh"
"ewww that was gross...."
"I'm gonna take a nap to get rid of this PBD."
by sam hi February 19, 2008
An acronym for "post-bender depression."
The depression and/or guilt that occurs after a night of heavy drinking (or doing drugs, or both, if you're into that). Usually accompanied by a hangover.
Ugh, I hate my life so much! I am totally suffering from PBD.
by J. Kunt July 22, 2007
"Peanut Butter Delights"

Quite possibly one of the most delicious things on the planet. (When made right,) a mouth watering mixture of chocolate, peanut butter, sugar and oats.
WARNING: They ARE addictive!!
PBD's are the best things in the world!!! Getchu some! ;D
by DrgnGrl7000 December 4, 2006
for when your pants make it look like you have a perma boner
oh fuck dude I permanent boner disorder (pbd) lemme adjust it real quick
by PENISGOBBLER12369420 August 20, 2022
Personal Blunt Day is when you meet up with all your homies and each smoke your own blunt. 1/2 way through you can optionally begin rotating the blunts.
I'm going to roll a fat blunt for PBD this weekend
by smokeweedevryday November 12, 2010
Post boy depression. Like post concert depression, but after you hang out with a boy you like.
Ugh, I’ve been having PBD ever since I hung out with Joe last night.
by Oglidesh November 6, 2017