Being so humiliated that one spontaneously ejaculates. The brain is so ashamed by a memory or senario that it's trigger defense is to ejaculate the bad experience out of memory. See also - Humaculate
Ejacumiliation is a problem for those with low self esteem and or next to no personality. May be experienced when your friends catch your mom pounding the milk man when you return from school. A group of women laughing at your penis size while someone beats the shit out of your dad may also cause Ejacumiliation.