Fat Bottomed Girl. Speaks for itself. From the song "Fat Bottomed Girls" by Queen. Note that rather than applying the term in a derogatory sense, as one might think at first, the song actually praises fbgs.
a.k.a. fat bottomed girl, a women with wide, voluptuous, curvy, plump hips and ass. The kind of gal who screams squeeze my ass. A women, who, in springtime always makes the two letter word answer to the question "what's up dude?" start with the letter m and end in the e.
Fizzy Bum Gravy - A result of eating mystery dishes and strange foreign foodstuffs, or from inadvertently drinking the local water on foreign land. The next day, said concoction plays havoc with your intestinesto the point that any loud noises or sudden movements will make you shit yourself. The resultant explosion from your arse sounds like the last of a washing up liquid bottle, emptying the entire contents of your bowel in 3 seconds. The by-product of this experience is known as FBG.
Hey do you see that guy over there, he walks different and talks different then all the other guys. Oh shawty? He’s FBG foreal good luck getting his attention he’s the biggest boss here