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1.
A loose girl or woman. A slut. A female who is not very choosy about who is shooting semen into her. Sperm toilets are commonly found in nightclubs, bars, concerts, St. Patrick's Day parades, colleges and universities.
Sperm toilets make excellent temporary girlfriends because they all swallow.
That bar is full of young sperm toilets.
Wow, John's new girlfriend is the same sperm toilet who
blew us under the boardwalk last week.
Look! That sperm toilet just threw up green beer and semen.
by Louis P. July 17, 2006
 
2.
A "sperm toilet" normally refers to a female in her teens or twenties, or possibly even her thirties, who has sex with many partners. She is promiscuous, and allows her sex partners to ejaculate into her vagina, mouth, and even into her anus. She can also be classified as a receptacle.
1. Man, I wish that chick was not such a sperm toilet, because she is actually very nice, and I'd like to have a relationship with her.

2. What time did you stop by her house? I hope I got there first because I don't the venereal disease that you probably infected her with.
by Rook's Buddy May 10, 2010