One of many slang words for semen. The male reproductive fluid, semen (or jizz) consists of a soap-like substance (secreted by the prostate and seminal vesicles), sperm, fructose (non-sweet sugar), and water. Its major purpose is to fertilize the ova (or "eggs") in most mammals and select other jawed vertebrates, and it goes by MANY names. It is secreted in the process scientifically known as ejaculation, during the male orgasm.
Although her porn name "The Jizz Guzzler" appears to suggest a definite fondness of manjuice, her nickname actually derives from her infamous binges on Spermie candy.