a b c d e f g
h i j k l m n
o p q r s t u
v w x y z | A-Z | 0-9 | Symbol Dictionary
Using the fretting hand touch the strings to mute them (stop them from sounding) when you pluck/strum, creating a more percussive sound.
Synonymous With: muted strum, rhythm click, chucking
Full Article on: fret hand muting