(click on the picture to enlarge it)
Rhythm is all around us in speech, in music and visually. When a rhythm is disturbed or interrupted in an unexpected manner, then we have syncopation. Most music does this to some extent but in some genres it is crucial: reggae, funk, jazz, blues, dubstep.
Satisfaction by The Rolling Stones is a well known example. Mick Jagger sings "before the beat", with the resulting syncopation making for a much more interesting listening experience:
Cheers, Tom.

AmethystLady
Pro
Thats my favourite stones track
xx