Hi I'm Michelle, my husband is Andy and we have an 18 month old son.
HotdogDncrs stands for Hot Dog Dancers. Anyone familiar with Mickey Mouse Clubhouse will know that at the end of each show Mickey and his pals do the "Hot Dog Dance". Our 18 month old son absolutely loves this show, and whenever this song comes on we all have to dance - hence Hot Dog Dancers.
As an aside, as a result of this song and dance, our son now calls Mickey "Hot Dog". Even after being to WDW 3 times and numerous reminders that his name is Mickey, he is still Hot Dog to him - we hope that Mickey won't be offended when we arrive in 10 days!