Aposiopesis (a-pos-i-o-pee’-sis): Breaking off suddenly in the middle of speaking, usually to portray being overcome with emotion.
Person: You . . . You’re President Trump! I can’t believe I’ve met you here . . . right here at Bear Bottoms! Best pole dancing club in Utah. Can I buy you a drink?
Him: No. Hmmm, uh, I thought this was a national monument–I’m looking for Bears Ears, not bottoms. I must’ve taken a wrong turn back there in Salt Lake City somewhere.
Person: But this is clearly a bar–and a sleazy one at that! How could you possibly mistake it for a pair of mesas out in the middle of nowhere?
Him: Security! Take this guy for a walk.
Definition courtesy of “Silva Rhetoricae” (rhetoric.byu.edu)