Sex Numbers 

A system of numbers used to define an amount much higher than it actually is; such as when people say how many times they've had sex.

Thomas: I swear, man, *pant* I've run around this building 18 times today!

Richard: Yeah, maybe in Sex Numbers. Lose some weight.

Sex Numbers by Phospheric July 4, 2009

Sex Tag Number 

The number of tags you need to click in order to get from any word to the "sex" definition on Urban Dictionary. For most words, this only takes 1-3 clicks, but other words require 8 or more.

The easiest test is to click the "random" button, and navigate your way to the "sex" definition, using only tags. This is similar to the Wikipedia game, except that its 10 times easier since, for some reason, "sex" seems to be tagged a lot.

"Umm...I'm pretty sure the sex tag number is 2. That's the average. If its more than that, it's probably an obscure word."

Sex Tag Number by snakeye January 27, 2010