The B.F.G. 

Stands for The Big Friendly Giant and is a common nickname for your dick.

Travis: So dude, you gonna be putting the moves on Ashley tonight?
Mike: Yeah but all I'll have to do is whip out The B.F.G. and he'll take it from there.

The B.F.G. by B-more Bro December 9, 2008

R.T.F. with the B.G. 

Simple... The Reverse Tit Fuck with the Ball Gobble. Rather than standing over her stomach while tit fucking, you stand over her face making it easy for her to gobble your balls at the same time.

"Your wife made me feel very welcome by offering me coffe, pie, and an R.T.F. with the B.G."

R.T.F. with the B.G. by Jonny Ryan June 4, 2007