Top definition
(verb, noun): The act of finding out about a new partner's
sexual preferences and no-go's. Defining which practices in the bedroom are within/without one's comfort zone.

From the German word "Nebelgrenze", indicating the border between fog / clear air.
to fogborder: "My new boyfriend and I fogbordered all weekend long, now I know what he's cool with and what not"
by Lasanie August 17, 2012
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