I don't think its a poo joke its just cute when she goes unyuu
Heartful Unyuu Manga
Tomoe's TroublesHuh? But Jun and Suiseiseki said that unyuu and strawberry daifuku are the sa...Hina, I went and bought you some strawberry daifuku.Yay! Strawberry daifuku!Eh?Hina-chan, is your strawberry daifuku tasty?Yep! My strawberry daifuku is tasty!Hinaichigo, it's not strawberry daifuku but "unyuu," right?You should just call it unyuu.