2. Drink Backwards Out of a Cup
Another of the popular remedies often touted is that you should trick backward out of a cup. This is a fairly awkward thing to try and do and will generally involve holding the cup and then leaning forward while trying to drink from the top without pouring water everywhere.
This makes a mess but it does force you to breathe differently and at the same time the water will pass through your nasal passage which seems to stimulate… something. The swallowing motion also becomes exaggerated and some combination of these effects apparently will often cure your hiccups!