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."

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.

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.

"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!!

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.

Post boy depression. Like post concert depression, but after you hang out with a boy you like.

Pbd is a group of high school rappers. It stands for Peabody Drive or the PeaBlock Deciphles. There are three of them in the group.