"Wombass" is an instrumental composition by Dutch disc jockeys and producers Tiësto and Oliver Heldens. It was released on 9 November 2015 in the Netherlands.

Olivier "Oliver" J. L. Heldens is a Dutch DJ and electronic music producer from Rotterdam. He is regarded as a pioneer of the future house genre, propelling it to international attention and scoring numerous chart successes, including "Gecko (Overdrive)", "Last All Night (Koala)", "The Right Song", "Fire in My Soul", and "Turn Me On". He also produces techno songs under the alias HI-LO, which comes from "Oli H" in reversed form, and runs the label Heldeep Records. Through February 2021, he is the 460th-most-streamed artist on Spotify, with over a billion cumulative streams.