This girl is just so cute!

Everything about her, from the way she acts and the way she talks to her actual appearance is just pure cuteness
I have a question for all the kanakana fans. I saw her catchphrase 'mokyu mokyu' referenced in this thread already but I haven't seen anything saying what it means. Does anyone know what it means? Is it kinda like 'doki doki' in that it kinda describes a feeling?