萌萌哒
méng méng dā
Originally used on a Chinese website to describe someone weird and in need of medication, this phrase now means cute. It is most often used to describe something, usually an animal, or somebody that is extremely cute. Sometimes, adults use this to describe themselves when they do something childish.
In a way, it is to say that someone is acting cute or adorable.
An example would be:
"不要萌萌哒的！“