Mushroom cup

When a man has an inverted dick tip where the cum pools inside it; also known as the holy grail

“Wow, I have my husband a bj last night and drank it from his mushroom cup!”

Mushroom Cupping

When an uncircumcised man stretches his foreskin over the penis of a circumcised man and they both blow their loads into his foreskin. Then it mushrooms out into the uncircumcised man.

Mushroom Cupping:
When an uncircumcised man stretches his foreskin over the penis of a circumcised man and they both blow their loads into his foreskin. His load was so huge that it split my foreskin. So now we can’t mushroom cup anymore