Exbalicar

Exbalicar is the "correct"(typo'd)spelling of Excalibur, the legendary sword wielded by King Arthur of Camelot.

Teacher:Today, we will be learning about King Arthur, the fabled King of England.

Pupil, not paying attention to what he's writing, accidentally writes "Exbalicar was the legendary sword owned by King Arthur."

Bullcarp

Typo-that-isn't-a-typo, non-offensive way of saying "bullcrap", mentioning carp, the fish.

Me:Hey, how're you doing?
Friend:Good, uh, I have something to tell you...
Me:What is it?
Friend:I broke your iPod while you loaned it to me.
Me:OH MY GOD WHAT THE HELL THAT'S BULLCARP!!!