The ratio of Biddys to Dunnys (guys to chicks) at a place at a perticular time.
4 guys and 4 girls is a b-d ration of 1.0
4 guys and 2 girls is a bad bd-ratio, and is a .5
6 girls and 2 guys is a great bd ratio, at 3.0.
"Man, this 2.0 ratio is awsome, gurranteed 3 ways for every dude!)
Guy. Generally cool guys.
Used as the opposite to the word Dunny.
Look at those Dunnys over there.
Man the Biddy Dunny ration is at 1/2, this is horrible.
Dude, we got a 3.0 B-D ratio, this is rockin'
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