The weasel war dance is a colloquial term for a behavior of excited ferrets and weasels. In wild animals, it is speculated that this dance is used to confuse or disorient prey. In domestic animals, the war dance usually follows play or the successful capture of a toy or a stolen object and is commonly held to mean that the weasel is thoroughly enjoying itself.
The Adventures of Ozzy–Ozzy the Weasel’s War Dance.