when you are typing in online chat you enter a letter (most often the letters in the middle of the bottom line in a digital keypad) close to the space bar by mistake, and it changes the meaning of the sentence.
1. Boyfriend: Hey sweetie, I am having thisbitch on my back since last night. (letter 'b' in itch)
Girlfriend: Who is that bitch?
Boyfriend: Sorry babe, it was a spacebar err.
2. John: There is always the shining bright Sun above all the cloudsnone could see. (letter 'n' in one)
Jim: why none ???
John: Sorry dude, it was a spacebar err.