fo 

a misspelling of "for" when someone is typing a mile a minute, or in capitalised form, the hypothetical compound of oxygen fluoride

Hey! That oxygen flouride is fo the birds!

fo by eszett March 8, 2003

Fo 

Short for a fourty Oz. bottle of Malt Liquor, preferably in OE or Big Bear.

"Yo, man, we're gonna need about 6 Fos tonight!"

Fo by Donatello Quentinstein Kennedy Ripken Sr. September 20, 2007

FO 

Abbreviation of Fuck off

Guy one: I don't like you
Guy two: FO

FO by 2451346523562 December 25, 2010

fo 

Expression of disgust often heard in Yucatan, Mexico.

Also spelled: Fó

Guy: Look at Pedro, he barfed all his cerveza.
Chick: Fo!

fo by MousePad July 25, 2008

FO 

Finished object
Especially used in craft & knitting blogs and magazines to designate a completed item
Synonym UFO: Unfinished item

e.g. My latest FO turned out pretty well.

FO by Eden Dickens December 5, 2006

fo 

1. the word for
2. the word four
3. the word so

1. i can get dis to yo fo three bones
2. Make that fo bones
3. Hey can you pull yo car up a lil bit fo we can park behind you?

fo by mikejones June 23, 2004

fo 

Friends Only on Livejournal.

My Livejournal is fo so no weirdos can read it.

fo by rawrrr. December 28, 2005