Upd: http://www.urbandictionary.com/define.php?term=the%20b%20part
the b part
What comes next. A little innuendo about getting to the "best" part, moving past flirting and getting down to it, time to get it on.
I really like what you're doing here, yet, I think you're gonna have to work just a little bit harder baby.
Yes boss, let me do the b part, pllllleeeeaaase!