It is originated from Barbie in a mermaid tail that had a song that said summer sunshine which was later changed to summer butt touch. The word means to go to a beach in Malibu in the summer and start touching boy's and girl's butts regardless of your gender.
by OllieKazam December 21, 2017

by Officer Wag January 10, 2016

by Dengus69 August 3, 2016
