caipirinha
In Brazil, it is a national cocktail, made with cachaça, sugar and lime.
In this case, caipirinha is another dance meme with various characters from different series. Their actions consist of wagging their finger and shaking their hips. Its Japanese name is "ぷんちきぱやっぱーヾ(゚∀゚)ノ♪ (punchiki-payappaa)."
This action sequence was done in one of the scenes from the series Azumanga Daiou, where Takino Tomo is berating Mihama Chiyo for being childish.