Hyperspermia
to produce more semen during an ejaculation than usual due to high levels of arousal or long-term abstinence from masturbation.
Boy/Girl 1: "Oh my god, that was a big cum shot!"
Boy/Girl 2: "I know! I must have hyperspermia or something ;)"
Boy/Girl 2: "I know! I must have hyperspermia or something ;)"