Naval term - a piece of sun-dried salt-encrusted canvas fire hose that has been cut to a managable length and is used to flog wogs with on wog day.

Actually, it's spelled "shillelagh". It's Irish for a walking cane (that can be conveniently used as a club or cudgel). Usually ornamentally carved. Common in Ireland but purchased by tourists for decoration/art.

A comical word for penis, as used by John Leguizamo, with an irish accent, in his 1 man theatrical performance.