Definitions by SmashorSmash

Mayonnaise Sandwich 

When you are fucking a girl and you finish on her chest, only to collapse from complete and utter exhaustion on top of her. You and the girl are the bread, and your cum is the Mayo

"Yo dude! How did you go last night?"
"Yeah I got some. At the end we became a Mayonnaise Sandwich"

Mayonnaise Sandwich by SmashorSmash May 2, 2019