1 definition by B. Dub

An acronym for Flat-ass calm. Used by sailors, fishermen and people who spend time on the water to describe a sea like glass.
"Going surfing today?"
"Nah man, it's F.A.C."

--or--

"Good day for fishing, it's F.A.C. out."
by B. Dub March 14, 2012

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×