Definition
Very likely to happen
How People Actually Use It
A standard female to male orgasmic ratio held by men of particular knowledge during sexual encounters, whereby the bare minimum of the female partner’s climatic satisfaction remains proportional to the ratio of 10 in relation to the male partner’s singular disengagement.
"Ten to One Rule - Female to Male Ratio: 10:1 - Initiated 50:5 - Accomplished 100:10 - Master Note: 10:1 - 40:4 must occur within the same evening 50:5 - 90:9 must occur within 24 hours 100:10 must be completed within 48 hours"
Source: Urban Dictionary