EF ratio 

A man's erect/flaccid ratio. Can be calculated using inches or centimeters, as the ratio will not change.

A penis which is 6 inches while erect and 3 inches while flaccid will result in an EF ratio of 2.

Just cuz your dick is 4 inches while soft as compared to my 2 inch soft dick doesn't mean it's bigger. I have an EF ratio of 4, while yours is 1.5

EF ratio by I M A Dogg March 17, 2009

tooth to gum ratio 

the ratio of gums to teeth in a person's mouth.

If someone has large gums and small teeth that is bad tooth to gum ratio and vice versa.

"Damn his smile is kinda scary, it looks like he has baby teeth and adult size gums - total bad tooth to gum ratio!"

tooth to gum ratio by BeanSprout December 18, 2011

five to one ratio 

the act of male masturbation .....five fingers one penis

i caught my room mate doing the five to one ratio

five to one ratio by FRANK B February 24, 2008

In/Sent Ratio 

The ratio between your received texts (inbox) and Sent texts (outbox). If your outbox has more texts than your inbox than you are probably a loser whose friends don't wanna text you back. If you inbox has more texts than your outbox, you probably have friends and are cool.

Karl: Dude! I feel so great right now I just checked my In/Sent Ratio and it's 146:130

Kevin: That's awesome!

In/Sent Ratio by RT Master February 8, 2009

chip to dip ratio 

That perfect amount of dip (salsa, hummus, etc.) to a chip leaving one with no extra dip or chips extremely rare

Guy 1: Holy crap I got the perfect chip to dip ratio
Guy 2: Are you some type of wizard or something

chip to dip ratio by LeChaz November 11, 2013

signal to noise ratio

1.)A term used in physics to describe the amount of information extracted from an electro-magnetic signal compared the information orginally introduced into that signal.
2.)term used by psuedo-erudites to describe the degree of usefulness found in communications by media, individuals or otherwise.

1.)Hey Jim, this stereo set up is fucked. I'm pumping out 200W but my system sounds like a transistor radio. That is one fucked up signal-to-noise ratio.

2.)Typically, a demogague actually benefits from non-sensical, contradictory and inflammatory statements and agendas. Ironically, the higher the signal-to-noise ratio, the more effective they become since any useful information would actually reign them in.

signal to noise ratio by Raul and JonG August 28, 2003

STD ratio 

A STD ratio is a simple acronym for Slut to Dude ratio. This helps when going into a bar and seeing if it is worthy of your patronage. A high STD ratio would mean there are more sluts than dudes, while a low STD ratio would mean the reverse.

Hey bro, I was just in Waterman's and the STD ratio was at least 3:1. I was super stoked. Lets do some G.

STD ratio by zeroisgod March 14, 2011