When you take your penis and testicles and put them on top of a clear glass table with someone underneath to see it in all its glory
I’m gonna show you my grassy bottom boat
Verb; Ass motor boating. To motor boat one’s Ass cheeks.
Rachel let me bottom boat her perfect ass!!!
When someone shits onto a glass coffe table while another person watches from underneath.
Similar to a "Hot Carl" or "Cleveland Steamer"
Hey Aleah, wanna go to Target and get a rusty glass bottom boat?