Salmon Suction Cup

When a person with an uncircumcised penis sticks the head of it to the receivers skin, then slides the foreskin over the head and holds it to the skin. While holding the foreskin in place, they pull the penis back away from the receiver, causing a suction cup with the foreskin. When it is released, it makes a "pop" sound.

Hey Devon, why is there a hickey on your thy? Oh Dennis gave me a Salmon Suction Cup last night!