The Guy In The Silver Shorts's definitions
Person A: "Dude My Fb Friends Keep Postin Dumb Shit All Over My Dashboard."
Person B: "Dude, 1st Rule Of Tumblr"
Person B: "Dude, 1st Rule Of Tumblr"
by The Guy In The Silver Shorts October 14, 2011
Get the 1st Rule Of Tumblrmug.