A person who takes pains in online discussions to point out when someone has made a spelling or grammatical error. This is usually used as an ad hominem attack during an argument, as though spelling and
grammar have a bearing on the validity of a statement.
While related to concepts like "grammar nazi", by contrast a "grammerfuck" is not just someone who is strict about spelling and
grammar, but someone who actively uses this tactic to attack someone they disagree with, to avoid direct discussion, or to undermine a debate.
The spelling of "
grammar" as "grammer" in the word is intentional, to demonstrate how much you
don't give a fuck about their rhetorical attack.
Online Conversation:
"You're family is rich, so I think you've got a different perspective on poverty."
"I think you
mean 'your'.
Maybe you should ask for your college tuition back?"
"Hey,
don't be a grammerfuck, how about making an actual point?"