Top Definition
A very large amount of semen ejaculated from the penis. A big ass load of cum shot out the penis.
I dropped a jizm bomb on your mom last night!
by MS The Fast Whitey February 16, 2007
1 more definition
A big ass load of cum ejaculated from the penis. A whole lot of cum.
I dropped a jizm bomb all over your mom.
by Mitchell Kurt February 15, 2007

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