noun
syncopation
sing-kuh-PAY-shun/ˌsɪŋkəˈpeɪʃn/
Rhythmic emphasis placed on normally weak beats or between beats.
The rhythm's syncopation places emphasis between the regular pulse markers.

Etymology
The cutting root, with syn- perhaps adding “thoroughly,” first connects to shortening a word by leaving out middle sounds. The musical use names an inversion of expected rhythmic emphasis, placing accents on normally weak beats.
In context
when you take a weak part of the bar and accent it that's called syncopation
More examples
- The bass line adds syncopation by stressing the weaker beats.
- We clap a steady beat while she sings with syncopation.
- The dancers match their steps to the song's lively syncopations.
Forms
syncopation · syncopations
syncopate verb — To place rhythmic accents on normally weak beats.
syncopated adjective — Having accents on weak beats or between beats.