freestyle

1. A sports event where competitors can choose their own method of participation.
2. A form of rapping in which the emcee makes up lyrics while rapping.
3. Modifying programming code in production and quality assurance environments, violating the existing procedures for deploying it.

1. (especially in rap music) To improvise one's own style; to ad-lib.
2. To improvise one's dance moves; dance freely.

noun

An alpine skiing discipline comprising aerials, moguls, cross, half-pipe and slopestyle as part of the Winter Olympics.