To dance ever so vigorously, in quite a .... mad way :) ,
This is the famous Futterwack from Tim Burton's (2010) Alice in Wonderland danced by none other than the mad hatter by moving and popping various parts of your leg from your waist to your feet
"I will futterwack vigorously if we succeed."
"Yoooo you might be able to jerk but I can futterwack!"
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