To be extremely stupid. So stupid that the word "blow" must be incorporated. Fagblow can be anyone in this category, ranging from a video game nerd, to a snotty 16 year old girl. Fagblow is usually very demeaning to someones self-esteem. Very good choice of words if in a verbal fight.
Xbox live nerd: omg!111 i just raped u nubkake with teh boomshot!11!1one!
Guy: Wow your fucking stupid kid.
Xbox live nerd: you just teh suk at this game!11111 raped!111one!
Guy: Fucking Fagblow, go see the sunlight.
by Joe AaaaaaaAaaAAaAA January 02, 2009
7 Words related to Fagblow

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