Halftime
Halftime (also called half-time or halfbeat ) is a common term in music for a passage that is played at half speed.
With a halfbeat, only every second counter is played, deviating from the basic rhythm. When playing the melody, the passage is played stretched to double the time. (e.g. when practicing a phrasing)
The halfbeat is a popular stylistic device, for example to highlight expressive vocal passages with a thinned-out accompaniment. The half-time shuffle is often played in blues, blues rock and rock music .
The opposite of halftime is doubletime if you continue to play at double speed.