'That thick shaft that causes women to shudder'
Lol, I couldn't believe he said that.
It's a quote at the beginning of mission 12 in a cutscene by Joker/Jester.
by "thick shaft" he's actually referring to an underground tunnel leading towards the tower, but it was obvious what kind of other 'shaft' he was alluding to.
I didn't mind it, but gotta say that quote took me by surprise though.