Top definition
when a person performs sex acts upon themselves while atop a coffee table that has a see thru glass top. A person laying below the table also performs sex acts upon themselves while they watch one another.
" i had a long crazy night with my wife, had the glass buttom boat going strong all night"
by glassbuttomboater May 21, 2016
Get the mug
Get a glass buttom boat mug for your Facebook friend José.