A shuffle is a constant stream of swung eighth notes. It is one of the most common rhythms in Blues and is also used in related styles such as Rock, Jazz, Funk, Gospel and Soul. All the examples on the previous page are shuffles.
There is a particular way of playing a shuffle on the guitar which is instantly recognizable. It is played on two adjacent strings like a power chord. The third finger is placed two frets up the neck on the same string as the first finger. The same two strings are played as in the fifth chord. Keep the first finger down even when playing with the third finger. This will result in a smoother, more solid sound. It also helps to use right hand damping with this pattern.
There are many different ways to play a shuffle. Here are some examples. The first one requires the use of the fourth finger at the fifth fret.