Kupaaa
Noun: The sound a baseball makes while inserting a baseball into her vagina.
Panty: "My first pitch!" *puts baseball up her pussy* "Kupaaa~"
Brief: "Kupaaa!? Panty, that's not the first pitch, that's your uterus!"
Brief: "Kupaaa!? Panty, that's not the first pitch, that's your uterus!"