The Cancelling-Out Method
A sexual act, apparently originating from Gateshead in which a man who does not want his girlfriend to get pregnant but has engaged in unprotected sex with her lets his friend ejaculate inside his girlfriend, which "cancels out" the first man's sperm.
Chavette 1 "Hoy, did ya use a condom?"
Chavette 2 "Nah, ah used "The Cancelling-Out Method" "
Chavette 1 "Good call, ya divvn't want to get pregnant a fourth time"
Chavette 2 "Nah, ah used "The Cancelling-Out Method" "
Chavette 1 "Good call, ya divvn't want to get pregnant a fourth time"