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1.
FBE
Babe-alicious Definitious:

The goddess for all babes in the known universe. She has also been fouund to be Goddess for babes in other dimensions.
Damn! that girl is as babe-alicious as FBE.
by lil demon442 May 13, 2010
 
2.
Feet behind ears: The naked position of a woman laying on her back with her feet behind her ears...
The F-B-E is a sexcellent kama sutra position where the man puts the woman's feet behind her ears, and penetrates her in the vagina and or buttocks...

Last night I gave Shaquanda the FBE...
by Hugh G Reckshen March 21, 2006
 
3.
FBE
Stands for "Full Body Erection". When something excites you so much that it makes you stand up straight asap.
Oh shit that 360 dunk by Kobe Bryant gave me a FBE
by Imadogg September 08, 2011
 
4.
Full Blown Erection
I'm too tired, I can't get an F.B.E.- Sam G.
by JessicaaaLeeeeee June 16, 2013