iced ink
"If you put water in the freezer you get iced water. What do you get if you put ink in the freezer?" "Iced ink" "Yes, you do stink! Ha ha ha!"
written by Pe*er Ga*ston, approved by Log

Double bluff possible; reply "icy ink". The other person may (a 1:25 chance) say "no, iced ink", allowing you full reversal privileges.
written by Jo* Bly*h, approved by Log