Definition-duellist

Someone who always brings up dictionary definitions to aid them in arguments on the internet.

A subclass of the keyboard-warrior who has studied and mastered the art of using-google-no-jutsu.

Step 1: Analyse the definitions of every single word of your opponent's argument.

Step 2: As soon as you find a mistake like a misused word, copy-paste the definition as your argument, invalidating everything your opponent just said and making them look stupid.

Step 3 (optional): Decorate and personalize your copy-pasted definition to give it your own flair.

Example A: 'Insert definition'. Just keep your mouth shut if you don't even know what you're talking about.

Example B: Hey, I totally see where you're coming from, but 'insert correction your opponent'.
'Insert definition'.
Don't worry, we all make mistakes!

Step 4: You won. We're using the second definition of won, since you didn't actually win anything in the sense of gaining. You can't even feel smart because you literally just used Google. But hey, that is the curse of being a true Definition-duellist.