freestyle >> ˈfriːstʌɪl
Definition: [adjective] denoting a contest, race, or version of a sport in which there are few restrictions on the moves or techniques that competitors employ.
Example: freestyle wrestling
Definition: [noun] a freestyle contest, in particular a swimming race in which competitors may use any stroke.
Example: the men's 100 m freestyle
Definition: [verb] dance, perform, or compete in an improvised or unrestricted fashion.
Example: he just came in and freestyled over the music