It's when you insert a banana into a woman's vagina and then you have sex with woman until banana comes out. Resulting in a banana cream pie.
by Bananas smash March 25, 2017
“My girl did the banana smash for me last night and we had to go to the ER at 3am. It was so worth it”
by Trashl0rd_King0fRefuse November 24, 2024