Top Definition
It's a percentage of positive-ness when you are not quite 100% sure but you are about 95-99% sure about something. Much like the variance in birth control effectiveness, depending on the type of person saying they are “birth control positive”, they’re percentage can fluctuate as low as 80% if they use it improperly. However, when used in combination of another friend who is also birth control positive, it can be 99.99% accurate.
person 1: Are you sure that it's supposed to rain today?
person 2: I am birth control positive that the weather man said to expect rain all weekend.
by Mrs. Meatball June 24, 2010
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