Poker term. When a frikkin idiot calls a huge bet with nothing and proceeds to catch two or more miracle cards for the win.
fish:"Wow, you had AK? When the flop came AK9 and you went all-in I was sure you were bluffing so I called with my 72. Good thing I caught running 7s for the set!"
Suckout city is the mythical place you go to when an underdog upsets the favorite or something unlikely occurs. The term is taken from the poker term suckout when a worse hand beats what statistically was the better hand before the suckout occurred.