by stefan`124 March 9, 2009

by emu March 5, 2003

Women who all have a child with the same mans sperm and support each other for the sake of the children.
"We didn't know too much about each other, but now that we're sperm sisters our sons have the right to know their brothers from other mothers"
by milk9837 October 18, 2011

by mc080290 December 22, 2006

The discharge that exist the penis right before the actual sperm. Also known as pre-nut. Loser sperm can actually cause conception resulting in a very stupid child that will grow into a stupid adult. Also known as Emo kids.
Sure you pulled out in time, but your son listens to emo music and crys...often. Your mistake of a son is the result of loser sperm.
by Rooster von dtuch November 1, 2006

Sperm that is the size of a large rat. During ejaculation the mans penis will explode and the sperm will pop out the wound like an alien. a man with mega sperm doesnt even need to have sex to get a girl pregnant, when a man with mega sperm ejaculates every woman in a 5 mile radius becomes pregnant. mostly occurs in areas like Liverpool or East London, hence the large amount of chavvetes with kids.
Charnice: omg, you know like, my boyfriend got me pregnant.
Chantelle: omg, really? he got me pregnant too
Charnice: thats cause he has Mega Sperm, innit?
Chantelle: Yeah, like brap. lets go get a KFC and live of the council benifits cause we got an infinite amount of children.
Chantelle: omg, really? he got me pregnant too
Charnice: thats cause he has Mega Sperm, innit?
Chantelle: Yeah, like brap. lets go get a KFC and live of the council benifits cause we got an infinite amount of children.
by hahalolhahalolcat May 30, 2009

Another word for a penis.
by Doreen Marie December 14, 2011
