Larp= Live Action Role Play. Instead of having a character sheet and sitting around the table describing what your character does, like Dungeons and Dragons, LARPing you actually act out what you do. :3
I find it less boring and more challenging than just sitting around. I used to table top and internet RP all the time, but then I found a group of Larpers and haven't gone back since. Some of us hardcore players even dress up in costume, to make the character seem more real, ya know?