grammattitude
The snooty, holier-than-thou attitude displayed by those who correct others' grammar, often in public. Many times, those with grammattitude come from academic backgrounds which lead them to believe they have a moral obligation to police use of the English language.
A: Between you and I, I thought it was totally nerdy for that guy to have such grammattitude.
B: Yeah, I wonder what his problem be?
B: Yeah, I wonder what his problem be?