The act of sitting on a chair covered in male ejaculatory excretions while chair is being hoisted up and down rythmicly (like the jewish barmitzvah tradition. It started by accident in mexico by the great philosopher Julioandro Sanchez (also accredited for the creation of the dirty sanchez).
Guy 1: Hey I just blew a huge load on that chair
Guy 2: My gfs coming over lets convince her to do the Mexican Chair Swinger
Guy 1: Ya thats a great idea. Theres enough ejaculate here to keep her stuck down.
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