the following guarantees to get rid of hic cups and is a show stopper in the office. When someone gets them, get them a cold drink of water (must be cold straight out of the vending machine) and get them to put their index finger in it, make the sign of the cross with it and leave immersed in the water for 30 or so seconds.
Have yet to see it not work. (all to do with distracting the mind apparently!!).
Still trying to work out how to stop vomiiting after 8 pints and a kebab though!!