Loud and clear. From military erminology. Old radios had two readings. Loudness and clarity rated from 0-5. Thus five by five means literally loud and clear.
How's my signal?

Five by five.
by huddaddy September 10, 2003
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Term meaning everything is OK.

The term comes from old radio slang. When communicating over radio, the operator would report the strength and clarity of the signal on a scale of 1 to 5 each. Therefore, if a radio operator described the signal as "five by five" it meant it was both loud and clear.
I don't use the phrase "five by five" because they use it on Buffy.
by SpeedoMask August 11, 2003
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A term used by Faith on Buffy, to discribe a situation as ok.
I'm feeling five by five
by jayde September 16, 2004
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Means " Things are OK"
"Five by five" was used in the film "Aliens" by the pilot during the dropship descent to LV-426 to denote that they were on course
by tonyhippy December 15, 2011
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Originally an aeronautical term that is the equivalent to the modern "Loud & Clear". In slang usage, it means "great, fine"; popular in New England, it was made famous in "Buffy: the Vampire Slayer" from its overuse by the rogue slayer Faith.
"No worries, B. That vamp tried to kill us but I got mad skills. We're five-by-five here."
by Sikozu Sta.-Ána September 4, 2003
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five in the goo and five in the poo!

^ fist in the pussy and a fist in the ass
i gave a girl a five and five last weekend.
now shes wearin a diaper
by TripleNickle April 12, 2006
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Taking someone to school in the art of foos by scoring on five consecutive shots -- the more variety the better. This is especially effective when done in the context of a booking, or when capped by a money shot.
Ain't nothing like going five-for-five against Pooch, nearly putting his eye out with the money shot.
by nickonov June 29, 2005
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