A Cum Bomb is when you tie a string around the head of your penis very tightly before jacking offover and over again so the semen cant escape your penis. Because the semen can't escape youe penis, it will continue to build up until you untie the string. If done correctly, once the string is untied, all the semen inyour dick should go shooting out and going everywhere as if it were a Cum Bomb.
Oh man, i just cum bombed and my room is a total mess, if i dont clean this up in time my mom will kill me.
Quicklymasturbating and generating an enourmos amount of cum within the span of 3 seconds. Generally can be done many times in quick succesion, and mainly used to defile your enimies.