Top definition
An attack on an opponent's grammar to completely discredit his/her argument.

See Ad hominem.
Faiz: I spent a good half-hour typing out an argument for nothing, because someone used Ad Graminum and pointed out my "your" that should have been "you're".

Julian: You deserved that.

Brian: The Lakers are fundamentally a much better team, they're offense is-
Julian: HA! "THEIR"!
Brian: Fuck you.
by jschoo February 05, 2012
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug