This one was a long time coming!  Again taken from the lab scene,

it is by far one of the most discusting things ever heard in any

any audience.  That is beside the infamous "homesick abortion" line!

As Frank drags his hand along Rocky's stomach this line is said

over his words," The sweat from his pores, as he works for his cause":
                                 

 THE SWEAT FROM HIS BALLS, AS HE FUCKS SANTA CLAUS