Define First Of All Meaning

First Of All
Used to shut people's opinion or to win in your argument. Also to make nonsense hilarious joke but not that funny but still funny.

Hey I thought you ate pizza an hour ago. And you still hungry?

Me: First of all, mind your own business
By Emylee
Well First Of All, Whore
*breathes* “well first of all, whore... I don’t appreciate you talking about my craft this way, that is really... that is really screwed up, whore...” -Quackity

someone exiles you? then you say, “well first of all, whore”
By Aubrette