State that some given information is incorrect.

The person who had bullshit called on them may call it back if they can prove they are correct.
Person #1: The first president of the U.S.A. was Thomas Jefferson.

Person #2: I'm gonna have to call bullshit on that.

Person #1: What?

Person #2: The first president was George Washington.
by Eye Sac May 6, 2006
The act of calling bullshit: When one person says something that another person is not in agreement with, that second person may "call bullshit" on whatever the first person said. By doing this, they are expressing their disagreement with what the person said in a humorous and yet serious way.
Person1: "Of course I don't drink! I'm not 21 yet so that's illegal."

Me:" Umm sorry, but I call bullshit on that. I was with you last night at that frat party and you were far from the perfect little sober college student you're pretending to be right now."
by Fuckin' Bullshit March 22, 2011
1. to call one out on a complete flasehood

2. an expression of distaste or aggrivation

3. to have found something at odds with a generally accepted truth
1. "i am the coolest person in the world"
"i call bullshit"

2. "we've got a 15 page paper due tommarow boyo, and it has to be written entirely in sanskrit"
"i call bullshit"

3. "george w. bush is a great president"
"i call bullshit"
by thought of this years ago October 1, 2006
To point it out when one is lying. In certain situations it may be used to refer to an unfair system or an outcome of such a system.
"I love you."
"I call bullshit. You're just trying to get laid."
OR
Men get paid more than women. I call bullshit!
by Ioulia called it! March 5, 2009
1. In sports when a referee makes a bad call.
2. The resulting chant of such a call at a hockey game.
Referee: High-sticking; 2 minute penalty.
Irate fan: Bullshit call!
Crowd: B-U-L-L-S-H-I-T BULLSHIT!!
by Lupin_IV September 10, 2007
An American war game phrase that refers to the common Bullshit encountered on Call of Duty, an American Sensation.

Call of Duty Bullshit can cause the repeated use of curse words such as fuck, bitch, queer, pussy, noob, along with others. It has also been related to holes in walls caused by controllers being thrown. It can also cause the banning of your xbox account for harassing the other players.
Adj./Noun

All of this can be yours for a low price of $60!
(Not including the ridiculously priced map packs)
"Dude it's just the normal Call of Duty Bullshit."

1.) When you knife the other person but the game believes you didn't.
2.) You are killed by a noobtubing flamer, just when you are about to get a kill streak.
3.) When you shoot someone a million times because they have painkiller and just turn around and kill you.
4.) When a person falls into last stand and shoots you once and you die.
5.) When you are on the edge of a kill streak, which is ruined by an enemy helicopter or harrier which kills you at least 5 times.
6.) When a bunch of assholes on the other team flash/stun you at least five times before they proceed to spray the shit out of you.
7.) Tactical Nuke.
by Call of Duty is Bull June 2, 2010