1 definition by THE Blonde Bombshell

An inordinate amount of ejaculation/sperm/jizz. Usually applies to a man that has not 'spanked the monkey' or had sex in awhile. Generally used after oral sex, when a woman can accurately determine the amount of ejaculate she has swallowed.
Woman: Wow honey -- that was JIZZTASTIC!

Man: I've been saving up.
by THE Blonde Bombshell August 14, 2010
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