An absolute and valid verbal justification of any action that is seemingly without a clear goal or purpose.
This expression is used to quickly make someone realize that the action in itself is so mindnumbingly cool and awe-inspiring that a purpose is no longer necessary.
Q: Why on earth would you want to play "Für Elise" on an HP Scanner!

A: Because I can

by The Smitemeister March 18, 2008
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A response to a question that you don't actually have an answer for.
Person A: If you're not a pedo, why do you have 15 little girls in cages in your basement?

Person B: Because shut up
by MISTER OWNINATOR December 21, 2009
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A phrase often uttered by people who have absolutely no logical reason for doing something when asked why they are doing said thing in the first place.
Bob: "Why did you burn down that house?"
Joe: "Because I can."
by VectorFluxion April 24, 2020
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What you say to someone when they get mad at you for being better than them.
Gamer 1: You're such a loser! 1,000 hours in a game! Get a life, no wonder I can't kill you! You don't do anything else!

Gamer 2: Mad because bad.
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Overall its a justifiable excuse for when you do something completely amazing or really stupid. From passing an exam to accidental setting your house on fire due to the fact that you didn't catch that last flaming chainsaw.
Example 1

Guy 1: "Dude how did you score with mandy last night?"

Guy 2: "Because I'm Batman!!"

Example 2

Officer: "Sir do you know how fast you were going?"

Guy 3: "It doesn't matter how fast I was going because I'm Batman!!!"
by Hourglass Mage May 5, 2011
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It is pretty much the greatest response to anything. Can be used for the following reasons:
1. The other party asks a question so retarded and obvious it doesn't merit a serious response.
2. Someone eavesdropping on a conversation asks a question about it.
3. You don't know the answer but know what your saying is true.
4. Some annoying brat is asking questions just to try and stump you.
5. just improv it into any situation for comedic value or to silence someone you don't like.
Example 1:

Guy 1: Why do people think Hitler was so bad?
Guy 2: Because fuck you thats why.
Example 2:

Guy to his buddy: So ya me and my girl were at the movies and we were going at it hardcore and...
Eavesdropping douche: Why wern't you paying attention to the movie?
Guy: Because fuck you thats why.
Example 3:

Guy: You see for every action there is an equal and opposite reaction.
Douche: why?
Guy: Because fuck you thats why.

Example 4:
Guy: Do you have any questions son?
Brat: Whys the sky blue?
Guy: Because the suns rays break up in the atmosphere and you only see the blue?
Brat: why?
Guy: Well because your eyes can only see certain colors.
Brat:why?
Guys: Well because your eyes laid out in a specific way that only allows that.
Brat: why?
Guy: Because fuck you thats why.

Example 5:
Girl: Why dont we just stay home and cuddle?
Guy: Because fuck you thats why.
by MC J.Bizzle March 29, 2012
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BOMC is an overused excuse that covers anything from simple blunders to awful failures. This phrase is used as an explanation for common shortcomings and can be used in most any situation. No matter what the occasion or what you did wrong, a concussion can always be blamed as the cause.
*In a small hospital room after a terrible accident while playing Cheerleader Chicken*

Cheerleader #1: Hey, how are you feeling?

Ashley: Abd oto ont. Teird tllite a. (Not too bad. A little tired.)

Cheerleader #1: I have no idea what you just said.

Ashley: Sorry I have dyslexia...Because of my concussion...
by Avon67 February 7, 2011
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