improv
noun /ˈɪmprɒv/
/ˈɪmprɑːv/
[uncountable] (informal)- a type of performance, often involving comedy, that has not been scripted (= written) or rehearsed (= practised) before the performance
- The pressure of 35 minutes of improv proves too much.
- Some of his former students have formed two new improv troupes in the city.