Taken from the hit Movie Back To The Future, used to context to indicate someone has made a poorly thought out decision lacking in judgement and basic common sense. SAid in a sarcastic tone of voice.
"Hello, McFly?" - followed by a rapping on head gesture when someone asks an obvious question.
by Steinfiend September 20, 2003
Get the McFly mug.
A band, yes, a BAND. And in my opinion, they ARE talented, and they play GOOD music. No, they are NOT punk or emo. They are simply POP. To the closeminded freaks who say people should listen to "good" music, shut your mouth and keep the hate to yourselves. McFly is a good band, whether you like them or not!
Someone who likes only one's music...
Closedminded freak: OMG!!! I H8 MCFLY!!! I LYKE LUVV MY MUSIC ONLII LYKE OMGG!!!
Me: Shut up.

Someone who doesn't like McFly but respects people's opinions...
Openminded person: I don't like McFly but it's your opinion if you like them.
Me: :)
by SolitaryxChild May 17, 2006
Get the McFly mug.
One of the best boy bandish bands in the UK. Sure they may play pop music but they do play their own instruments and write their own music. Stop dissing them.
McFly?! Oh you mean that great band!! Yeah, they're great.
by Kaley C May 31, 2005
Get the McFly mug.
A unit of measurement consisting of the product of meters cubed and kilograms, divided by seconds raised to the fourth power.


The McFly is based on multiplying 88 Miles Per Hour by 1.21 gigawatts, as described in Back the the Future.
Driving at 88 miles per hour and receiving 1.21 gigawatts from a bolt of lightning gives you 47,600,000,000 McFlys, or 47,600,000 kiloMcFlys, or 47,600 megaMcFlys, or 47.6 gigaMcFlys.
by Baller-Ass Nigga October 21, 2004
Get the McFly mug.
A UK band that is often compared to today's One Direction. They are TWO different band. so just because Mcfly doesnt talk about a girl being beautiful and junk they are hated. man up, there are other things in life.
One Directioner: Omigod i love 1D they're so hot, cute, talented blah blah blah.
Me: Personally I like McFly.
1Der: how could you like them they ripped of 1D blah blah blah.
Me: -_- STFU
by McFlyin' June 8, 2012
Get the McFly mug.
A debilating cramp that occurs while manipulate ones genitalia, also known as temporary parkisons.
"The other day I was jerking it, I got so into it I pulled a McFly"
by Lagginwaggin June 25, 2009
Get the McFly mug.
An amazing band that is often called crap cause they are boys in a POP band. They are boys in a band but aren't half of the band out there boys in a band, why arent they boyband? Cause the don't play pop? Oh.. now I get it.
Quoted by Tom The fat one that aint fat anymore: We are a POP band, people always say that we are wannabe rock or punk/rock band but we are not, we are pop!
Likes of Simple Plan&Good Charlotte&Green Day&Blink 182 have said they liked them. *Shoves hand in your face and shouts 'FACE'*
And sure Busted&McFly DID sound the same.. why? THEY OFTEN WROTE THEIR SONGS TOGETHER! I have seen them live and they were amazing... just watch their tour DVD and be *Puts on Star Wars like voice* CONVINCED!
And to the ones that say they are 'Un-attractive* Can I feel.. a bit of jealousy? I think I can *Feels it* Hell yeah I can.
To be really original;
They are better than YOU!
Guy one: Gee, lyk omgz I like System of a down&Korn they are way better than McFly
Guy two: *Kills guy one* =
Be afraid, be very afraid....
by Miss M Way December 16, 2005
Get the McFly mug.