noun: a puffy vest, usually made of down, as worn by Marty McFly in Back to the Future.
It is a little bit chilly today. I better wear my marty mcfly.
by Sarah234 September 20, 2006
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To walk backwards from a person/persons (who are trying to catch you) on a roof top, and just falling/dropping off the ledge. The person/persons assume your dead, but out of nowhere you hover up on an flying craft and escape.
Marty Mcfly escapes the old Biff by falling off the tower, and being saved by Doc Brown in the time machine. Hence the term "Marty Mcflyed"
by Endless1013 November 22, 2013
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Riding a skateboard while under the influence of marijuana where the experience can be compared to riding a hoverboard from Back to the Future 2.
"Man, I blazed before taking the board out. I was Marty McFlying all afternoon!"
by D2U3R4 May 9, 2009
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To sleep in one's clothes, as done by the character Marty McFly in the movie "Back to the Future". Also known as "Michael J. Fox it".
I'm too tired to change into my pajamas. I'm just going to Marty McFly it.

I'll lose my sleepiness if I change into my pajamas. I'm just gonna have to Marty MacFly it.
by MacFly April 20, 2010
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A trick in skateboarding. When you are done skating for the time being you and kick the tail of the board sending it into the air and lands in your grasp.
Explanation: Why are those kids so astoundingly happy when they received their (skate/hover)board back from Marty McFly in the Back to the Future trilogy? The only trick that he does is kick the board up to his hands and give it to the child... silly Marty, you ain't that sweet.

Ex 1: "Dude you've been skating all day... Marty-McFly that bitch and lets do something else"

Ex 2: "Yo, Marty-McFly your board and let me try a kickflip"
by Stevenoni January 20, 2008
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noun or verb
a specific type of threesome with two partners separately but at the same time due to the 'Back to the Future' like time travel that occurs in certain countries on the first Sunday in November at exactly 2AM.
"I had sex with Jessica at 2AM, and precisely one hour later I had sex with Bridge... at the exact same time! Its a Back to the Future threesome! I did a Marty McFly!"
"Whoah, this is heavy."
by Great Scottt February 3, 2019
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To walk backwards haphazardly, usually resulting in an unwanted encounter or physical altercation. Derives from Marty McFly from "Back to the future", as this action usually precedes a very bad event.
That kid over there was Marty McFlying all over the store and knocked down the tower of sodas.
by F. Millmore April 23, 2010
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