A phrase used in response to someone starting a new thread/conversation/tweet/etc... about a topic/website/video/etc... that was discussed ad nauseum by the rest of the civilized world a number of months/years ago.

The phrase is derived from the Back to the Future trilogy of movies which involved a DeLorean that could travel through time. The plot of the first movie in the trilogy revolves around the main character becoming trapped in the past when he can't refuel the DeLorean.
Moron: The Cake Is A Lie!

Reply: Welcome to two years ago... Don't forget to refuel your DeLorean.
by Etragorn December 24, 2009
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Why don't you have a seat?

The command used by Chris Hansen, of Dateline NBC, before publicly humiliating and destroying would be child molestors on national television. No matter how much the child molestor wants to run, for reasons unknown to man, he cannot leave and always takes a seat.
Chris Hansen: Why don't you have a seat?
Child Molestor: Oh shit! I swear I wasn't going to do anything with that 13 year old boy. I have to go now!
Chris Hansen: Why don't you have a seat right over there.
Child Molestor can't help himself, and has a seat.
by BNov November 10, 2007
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Don't Drop your Earing

When you drop your earing you bend over to get it when your next to ur husband it looks like a bj! At the royal wedding Kate dropped hers on the balcony and it looked like she was giving william a bj =p
Wills- Drop ur earing !
Kate- Alrite =))))))
Queen- Don't Drop your earing
by FUNIPPL. July 12, 2011
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I don't feel so good

Spoiler Alert:
At the end of the Avenger's: Infinity War movie, Thanos disintegrates half of the population in the universe, including Spider-Man, who says "I don't feel so good" before disintegrating.
Person 1: I don't feel so good
*Person 1 has disintegrated*
by JSSmith the GOAT May 05, 2018
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I Don't Know, Can You

A simple phrase, but usually uttered by trash human beings. Usually it is a sarcastic response after someone says "Can I ....... (Enter More Sentence Here)?" If someone says this near you, you may want to exclude them from your friend list.
Person 1: "Can I get a drink of water?"
Person 2: "I don't know, CAN YOU?"
by Mr. EEEEEEE October 28, 2019
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I don't feel so good

A sentence said by Peter Parker (Spider-man) before turning to dust and dying. If saying this in front of a marvel stan or tom holland stan, it could cost a punch, slap etc.
'Mister Stark, I don't feel so good.'
'You're alright'
by _lestranger October 10, 2018
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Don't let anyone get over on you! Be alert and aware of shady people. (Often said as a goodbye)
by angelas3656 June 15, 2012
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