Wiktionary
freestyler
n. Someone who competes in a freestyle sport such as freestyle skating or freestyle swimming
Wikipedia
Freestyler (song)
"Freestyler" is a single by Finnish hip hop group Bomfunk MC's. It was released in October 1999 in Finland as the third single from their debut studio album In Stereo (2000). It was released in February 2000 internationally and was a worldwide success, topping the charts in Sweden, Germany, Australia, Norway, New Zealand, Austria, Switzerland, Turkey, Belgium, the Netherlands and Italy. It also peaked at number two in Denmark and the United Kingdom and number three in Ireland.