Is when a person above the age of 60 says that something was harder back then.
Justin: It's so hard to walk to school everyday.

Old person: Back in my day I had to walk over Mt. Everest to get to school.
by Balls and tiddies August 31, 2022
A catching up experience with some old friends. Often a more ridiculous or outlandish get together as you all rage like you once remember doing.
I caught up with Celia, Ruebens and Alex at Lincoln and Beldin and fucking shit yo, it was a back in the day buffet.
by Voltaire Sterling January 13, 2008
Celebrated each November 5th, Back to the Future Day is our opportunity to recognize Doc Brown's discovery of the Flux Capacitor, the device that makes time travel possible. Back to the Future Day is celebrated by wishing everyone a Happy Back to the Future Day, and updating your social media networks statuses accordingly.

On November 5th, 1955, Dr. Emmet Lathrop Brown (Doc Brown to his friends), was attempting to hang a clock in his bathroom. As he reached over, he lost his footing , slipped from the toilet that he was standing on, and struck his head against the side of the sink.

Unconscious, Doc had a vision. And that vision was that of a Flux Capacitor — the device that makes time travel possible.

Requiring 1.21 gigawatts of electrical power and to be moving at a speed of 88 mph (142 km/h) the Flux Capacitor allows one to move forward or backwards in time.

Dr. Emmet Brown, on this day in history, we salute you, and remember your red letter date in the history of science!
Back to the Future Day: The Origin Story
Dr. Emmett Brown: Then tell me, "Future Boy", who's President in the United States in 1985?
Marty McFly: Ronald Reagan.
Dr. Emmett Brown: Ronald Reagan? The actor? Then who's VICE-President? Jerry Lewis? I suppose Jane Wyman is the First Lady!
Marty McFly: Whoa! Wait! Doc!
Dr. Emmett Brown: And Jack Benny is Secretary of the Treasury.
Marty McFly: Doc, you gotta listen to me.
Dr. Emmett Brown: I've had enough practical jokes for one evening. Good night, Future Boy!
Marty McFly: No, wait! Doc. Doc. The-the-the bruise - the bruise on your head. I know how that happened! You told me the whole story. You were standing on your toilet, and you were hanging a clock, and you fell, and you hit your head on the sink. And that's when you came up with the idea for the Flux Capacitor... Which... is what makes time travel possible....
by malarky2020 November 5, 2009
back to the past day begins on December 21, this where all the users on many social media change their profile picture and username back when they joined that social media platform you can change back your username and profile picture when it hits December 22.
yomother32: hey it's 21 December you know what that means.
slayer32: well its "back to the past day"
ronnyjohns: you got it
by Yourfriendlyneighbordowntheboc December 19, 2021
A situation in which a person has so little support, that they pretty much stop caring about everyone around them and take what they damn well please.
Joe: "I tried getting my teammates involved, but they were so god awful I said screw it and went back to my Cleveland Days."

Francis: "Did you guys win?"

Joe: "Yeah"

Francis: "Were your teammates pissed?"

Joe: "Who the fuck cares?"
by Joejitsu101 June 10, 2013
Get back with that one you missed out on. Get back with your ex day is so you can have a second shot
Dang I might have another shot, tomorrow is get back with your ex day
by Mr cherry popper November 1, 2018