Dead notes are just notes that you mute with your fretting hand and marked as XXXX's on tabs. You just mute all the strings or a few that are next to each other and strum those strings. You'll get a hucka chucka kinda sound and sounds badass when you add wahwah and other effects. Its good to use a few fingers to mute or you'll get harmonics.
"During this line, the kid acted like he was pushing buttons on a calculator in the air. The kid played ******* air-calculator!"Myspace